NCERT Solutions for Class 10 Science Updated for 2021-22 Free PDF
NCERT Solutions Science Class 10 are very important information that helps the students in understanding the complex topics and helps them in the preparation of Class 10 board examination. Studying the answers to the questions in the textbook will check your understanding of a particular topic and helps you determine your strengths and weaknesses. These NCERT Solutions for Class 10 Science are prepared by our subject experts in such a way that the students understand all the topics covered in the syllabus of CBSE 10 science quite effectively.
Access NCERT Solutions of Class 10 Science all chapters in PDF
The Solutions of NCERT Books also helps students to understand the topic thoroughly, which is very important not only from the point of Class 10 examination but better understanding lays a great foundation for their future studies. Quite often, questions from the textbooks are also asked in competitive examinations. We have covered both intext and exercise questions in detail.
NCERT Solutions Class 10 Science Book All Chapters Brief:
Chapter 1 – Chemical Reactions and Equations – Term I
The first chapter of Class 10 NCERT Science will teach the students about chemical reactions and how to write equations, how to conduct combination and decomposition reactions and more. In the previous classes, we have learned about physical and chemical changes of matter. Whenever a chemical change occurs, we can say that a chemical reaction has taken place. A complete chemical reaction represents the reactants, products and their physical states symbolically. Students will also study how to write a chemical reaction, which is a symbolic representation of a chemical reaction. The chapter also explains how various chemical equations can be balanced in different states.
The next subtopic teaches about various chemical reactions such as Combination Reaction, Decomposition reaction, Displacement Reaction, and Double Displacement Reaction along with various examples and chemical reactions. On the basis of energy, exothermic and endothermic reactions are explained. Exothermic reactions are those reactions in which heat is given out along with the products and endothermic reactions are those reactions in which energy is absorbed. Then redox reaction is explained, which is a combination of reduction reaction and oxidation reaction. The chapter explains all types of reactions with suitable examples with their respective chemical equations.
Topics Covered in Class 10 Science Chapter 1 Chemical Reactions and Equations for First Term:
Chemical reactions: Chemical equation, Balanced chemical equation, implications of a balanced chemical equation, types of chemical reactions: combination, decomposition, displacement, double displacement, precipitation, neutralization, oxidation and reduction.
Also access the following resources for Class 10 Chapter 1 Chemical Reactions and Equations at BYJU’S:
- CBSE Science Notes For Class 10 Chapter 1
- Important Questions for Class 10 Science Chapter 1 – Chemical Reactions And Equations
- NCERT Exemplar Class 10 Science Solutions for Chapter 1 – Chemical Reactions And Equations
Chapter 2 – Acids, Bases and Salts – Term I
NCERT Class 10 Science Chapter 2 is all about acids, bases and salts. In previous classes, students have learned that the sour and bitter tastes of food are due to acids and bases, respectively, present in them. We all know that acids are sour in taste and change the colour of blue litmus to red, whereas, bases are bitter and change the colour of the red litmus to blue. In this chapter, we will study the reactions of acids and bases, how acids and bases cancel out each other’s effects and many more interesting things that we use in our day-to-day life. Students will get to understand the chemical properties of acids and bases, how acids and bases react with metals, how do metal carbonates and metal hydrogen carbonates react with acids, how do acids and bases react with each other, reaction of metallic oxides with acids and reaction of a non-metallic oxide with base explained with suitable examples and various chemical reactions.
The chapter then explains what all acids and bases have in common with a suitable example which gives the conclusion that acid solution in water conducts electricity. Students get to learn various experiments on what happens to acid or a base in a water solution and how strong are acid or base solutions by making use of universal indication. Along with it, students will get to learn about the importance of pH in everyday life. The chapter ends with explaining in detail about salt preparation, properties and its uses.
Topics Covered in Class 10 Science Chapter 2 Acids, Bases and Salts for First Term:
Acids, bases and salts: Their definitions in terms of furnishing of H+ and OH– ions, General properties, examples and uses, concept of pH scale (Definition relating to logarithm not required), importance of pH in everyday life; preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris.
Also access the following resources for Class 10 Chapter 2 Acids, Bases and Salts at BYJU’S:
- Acids, Bases and Salts Class 10 Chapter 2 Notes
- Chapter 2 -Acids, Bases and Salts
- Revision Notes For Class 10 Science Chapter 2 – Acids, Bases and Salts
- NCERT Exemplar Class 10 Science Solutions for Chapter 2 – Acids Bases And Salts
Chapter 3 – Metals and Non-metals – Term I
In previous class, students have learned about various elements that can be classified as metals or non-metals on the basis of their properties. Here in Chapter 3 of Class 10 Science, students will learn about the physical properties of metals and non-metals. Metals are lustrous, malleable, ductile and are good conductors of heat and electricity. They are solid at room temperature, except mercury which is a liquid. The physical properties of metals are explained on various parameters such as ductility, malleability, tensile, strength, etc. On the basis of physical properties, metals and non-metals are differentiated. Some of the examples of non-metals are carbon, sulphur, iodine, oxygen, hydrogen, etc. The non-metals are either solids or gases except bromine which is a liquid. Under the subtopic chemical properties of metals, chemical reactions are discussed with oxygen gas, water, acids and other metal salts. On the basis of reactivity series the reactions and conditions depend. The reactivity series tops potassium as the most reactive and Gold as the least reactive.
The compounds formed in this manner by the transfer of electrons from a metal to a non-metal are known as ionic compounds or electrovalent compounds. Some of the general properties for ionic compounds are physical nature, melting and boiling points, solubility and conduction of electricity. Metal is extracted from its ore and then refining them for use is known as metallurgy. Metals are refined by using the method of electrolytic refining. The end topic explains about corrosion and how it can be prevented.
Topics Covered in Class 10 Science Chapter 3 Metals and Non-metals for First Term:
Metals and nonmetals: Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds.
Also access the following resources for Class 10 Chapter 3 Metals and Non-metals at BYJU’S:
- CBSE Class 10 Chapter 3 Metals and Non-metals Notes
- Revision Notes For Class 10 Science Chapter 3 – Metals and Non-metals
- NCERT Exemplar Class 10 Science Solutions for Chapter 3 – Metals And Non Metals
Chapter 4 – Carbon and its Compounds – Term II
In the previous chapter, we discuss compounds of importance to us. In this chapter, we will study some more interesting compounds and their properties. Also, we shall be learning about carbon, an element which is of immense significance to us in both its elemental form and in the combined form. Carbon is a versatile element that forms the basis for all living organisms and many of the things we use. Covalent bonds are formed by the sharing of electrons between two atoms so that both can achieve a completely filled outermost shell. Carbon forms covalent bonds with itself and other elements such as hydrogen, oxygen, sulphur, nitrogen and chlorine. Organic compounds are categorized into saturated and unsaturated carbon compounds. Saturated compounds are compounds with only a single bond. Unsaturated carbon compounds are compounds with a double or triple bond. The saturated compounds of carbon and hydrogen are methane, ethane, propane, butane, pentane and hexane.
The chapter also explains some of the chemical properties of carbon and its compounds such as combustion, oxidation, addition reaction, substitution reaction. Ethanol and ethanoic acid are carbon compounds of importance in our daily lives. Soap and detergents are studied with their chemical structures and properties and their difference is also discussed. Detergents are usually used to make shampoos and products for cleaning clothes.
Topics Covered in Class 10 Science Chapter 4 Carbon and its Compounds for Second Term:
Carbon compounds: Covalent bonding in carbon compounds. Versatile nature of carbon. Homologous series.
Also access the following resources for Class 10 Chapter 4 Carbon and its Compounds at BYJU’S:
- CBSE Class 10 Science Chapter 4 Carbon and its Compounds Notes
- NCERT Exemplar Class 10 Science Solutions for Chapter 4 – Carbon And Its Compounds
Chapter 5 – Periodic Classification of Elements – Term II
In Standard 9 we have learned that matter around us is present in the form of elements, compounds and mixtures and the elements contain atoms of only one type. The early attempts at the classification of elements resulted in grouping the then-known elements as metals and non-metals. Dobereiner grouped the elements into triads and Newlands gave the Law of Octaves. Mandelvee arranged the elements in increasing order of their atomic masses and according to their chemical properties. He even predicted the existence of some yet to be discovered elements on the basis of gaps in his Periodic table. The modern periodic table came into existence. Mendeleev’s Periodic Law was modified and the atomic number was adopted as the basis of the Modern Periodic Table and the Modern Periodic Law can be stated as follows: ‘Properties of elements are a periodic function of their atomic number’.
In this chapter, Periodic Classification of Elements, elements in the Modern Periodic Table are arranged in 18 vertical columns called groups and 7 horizontal rows called periods. Elements thus arranged show periodicity of properties including atomic size, valency or combining capacity and metallic and non-metallic character. The valency of an element is determined by the number of valence electrons present in the outermost shell of its atom. The term atomic size refers to the radius of an atom.
Topics Covered in Class 10 Science Chapter 5 Periodic Classification of Elements for Second Term:
Periodic classification of elements: Need for classification, early attempts at classification of elements (Dobereiner’s Triads, Newland’s Law of Octaves, Mendeleev’s Periodic Table), Modern periodic table, gradation in properties, valency, atomic number, metallic and non-metallic properties.
Also access the following resources for Class 10 Chapter 5 Periodic Classification of Elements at BYJU’S:
- CBSE Class 10 Chapter 5 Periodic Classification of Elements Notes
- Revision Notes For Class 10 Science Chapter 5 – Periodic Classification of Elements
- Chapter 5 – Periodic Classification of Elements
- NCERT Exemplar Class 10 Science Solutions for Chapter 5 – Periodic Classification Of Elements
Chapter 6 – Life Processes – Term I
NCERT Class 10 Science Chapter 6 explains Life Processes. There are six life processes that all living organisms perform. They are movement, respiration, growth, reproduction, excretion and nutrition. The chapter also teaches about nutrition which means the process of taking in food and using it for growth, metabolism and repair. Nutritional stages are ingestion, digestion, absorption, transport, assimilation, and excretion. Nutrition is further divided into Autotrophic Nutrition and Heterotrophic Nutrition. Autotrophic nutrition involves the intake of simple inorganic materials from the environment and using an external energy source like the Sun to synthesize complex high-energy organic material. Heterotrophic nutrition involves the intake of complex material prepared by other organisms. Different types of heterotrophic nutrition are parasitic nutrition, saprophytic nutrition and holozoic nutrition. The next topic is nutrition in human beings. The various steps of nutrition are ingestion, digestion, Oesophagus, stomach, small intestine, bile, absorption, assimilation and egestion. The next subtopic is respiration in which the human respiratory system is explained beautifully. The different elements of the human respiratory system are lungs, bronchi, larynx, pharynx, etc. During the process of respiration, organic compounds such as glucose are broken down to provide energy in the form of ATP. ATP is used to provide energy for other reactions in the cell.
Respiration may be aerobic or anaerobic. Aerobic respiration makes more energy available to the organism. For plants, the soil is the nearest and richest source of raw materials like nitrogen, phosphorus and other minerals. In human beings, the transport of materials such as oxygen, carbon dioxide, food and excretory products is a function of the circulatory system. The circulatory system consists of the heart, blood and blood vessels. In highly differentiated plants, transport of water, minerals, food and other materials is a function of the vascular tissue which consists of xylem and phloem. In human beings, excretory products in the form of soluble nitrogen compounds are removed by the nephrons in the kidneys. Plants use a variety of techniques to get rid of waste material.
Topics Covered in Class 10 Science Chapter 6 Life Processes for First Term:
Life processes: ‘Living Being’. Basic concept of nutrition, respiration, transport and excretion in plants and animals.
Also access the following resources for Class 10 Chapter 6 Life Processes at BYJU’S:
- CBSE Class 10 Science Notes Chapter 6 Life Processes
- NCERT Exemplar Class 10 Science Solutions for Chapter 6 – Life Processes
Chapter 7 – Control and Coordination
Chapter 7 of Class 10 teaches about control and coordination which are the functions of the nervous system and hormones in our bodies. The responses of the nervous system can be classified as a reflex action, voluntary action or involuntary action. The nervous system uses electrical impulses to transmit messages. It gets information from our sense organs and acts through our muscles. Chemical coordination is seen in both plants and animals. Hormones produced in one part of an organism move to another part to achieve the desired effect. A feedback mechanism regulates the action of the hormones.
Also access the following resources for Class 10 Chapter 7 Control and Coordination at BYJU’S:
- CBSE Class 10 Science Chapter 7 Control and Coordination Notes
- NCERT Exemplar Class 10 Science Solutions for Chapter 7 – Control And Coordination
Chapter 8 – How do Organisms Reproduce – Term II
Unlike other life processes, reproduction is not essential to maintain the life of an individual organism. How do Organism Reproduce chapter involves the creation of a DNA copy and additional cellular apparatus by the cell involved in the process. Depending on their body design, various organisms use different modes of reproduction. In fission, many bacteria and protozoa simply divide into two or more daughter cells. Organisms such as hydra can regenerate if they are broken into pieces. They can also give out buds which mature into new individuals. Roots, stems and leaves of some plants develop into new plants through vegetative propagation. These are examples of asexual reproduction where new generations are created from a single individual. Sexual reproduction involves two individuals for the creation of a new individual. DNA copying mechanisms create variations which are useful for ensuring the survival of the species. Modes of sexual reproduction allow for greater variation to be generated.
Reproduction in flowering plants involves the transfer of pollen grains from the anther to the stigma which is referred to as pollination. This is followed by fertilisation. Changes in the body at puberty, such as an increase in breast size in girls and new facial hair growth in boys, are signs of sexual maturation. The male reproductive system in human beings consists of testes which produce sperms, vas deferens, seminal vesicles, prostate gland, urethra and penis. The female reproductive system in human beings consists of ovaries, fallopian tubes, uterus and vagina. Sexual reproduction in human beings involves the introduction of sperm in the vagina of the female. Fertilisation occurs in the fallopian tube. Contraception to avoid pregnancy can be achieved by the use of condoms, oral pills, copper -T and other methods.
Topics Covered in Class 10 Science Chapter 8 How Do Organisms Reproduce for Second Term:
Reproduction: Reproduction in animals and plants (asexual and sexual) reproductive health-need and methods of family planning. Safe sex vs HIV/AIDS. Child bearing and women’s health.
Also access the following resources for Class 10 Chapter 8 How do Organisms Reproduce at BYJU’S:
- CBSE Class 10 Science Chapter 8 How Do Organisms Reproduce Notes
- Chapter 8 -How do Organisms Reproduce?
- NCERT Exemplar Class 10 Science Solutions for Chapter 8 – How Do Organisms Reproduce
Chapter 9 – Heredity And Evolution – Term II
In this chapter, we will learn about Heredity and Evolution. We have seen that reproductive processes give rise to new individuals that are similar, but subtly different. We have discussed how some amount of variation is produced even during asexual reproduction. The Rules for the Inheritance of Traits in human beings relate to the fact that both the father and the mother contribute practically equal amounts of genetic material to the child. This means that each trait can be influenced by both paternal and maternal DNA. Sex can be determined by different factors in various species. Changes in the non-reproductive tissues caused by environmental factors are not inheritable. Speciation may take place when the variation is combined with geographical isolation. Evolutionary relationships are traced in the classification of organisms. Tracing common ancestors back in time leads us to the idea that at some point in time, non-living material must have given rise to life.
Evolution can be worked out by the study of not just living species, but also fossils. Complex organs may have evolved because of the survival advantage of even the intermediate stages. Organs or features may be adapted to new functions during the course of evolution. Evolution cannot be said to progress from lower forms to higher forms. Rather, evolution seems to have given rise to more complex body designs even while the simpler body designs continue to flourish. Study of the evolution of human beings indicates that all of us belong to a single species that evolved in Africa and spread across the world in stages.
Topics Covered in Class 10 Science Chapter 9 Heredity and Evolution for Second Term:
Heredity: Heredity; Mendel’s contribution- Laws for inheritance of traits: Sex determination: brief introduction.
Also access the following resources for Class 10 Chapter 9 Heredity and Evolution at BYJU’S:
- CBSE Class 10 Science Chapter 9 Heredity And Evolution Notes
- NCERT Exemplar Class 10 Science Solutions for Chapter 9 – Heredity And Evolution
Chapter 10 – Light Reflection and Refraction – Term I
In NCERT Class 10 Science Chapter 10, we will study the phenomena of reflection and refraction of light using the straight-line propagation of light. These basic concepts will help us in the study of some of the optical phenomena in nature. The chapter also discusses the reflection of light by spherical mirrors and refraction of light and their application in real life. Light is a source of energy which generates a sensation of vision in human beings. Light seems to travel in straight lines. The different types of a spherical mirror, convex and concave are taught. The various terms related to spherical mirrors like the centre of curvature, the radius of curvature, etc, focus, pole, etc are discussed with ray diagrams. Uses of a spherical mirror are also discussed in this chapter. Mirror formula gives the relationship between the object-distance, image-distance, and focal length of a spherical mirror. The focal length of a spherical mirror is equal to half its radius of curvature.
Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light rays toward the normal to the boundary between the two media. The phenomena of refraction can be understood easily by the concepts of the refractive index and optical density. The refractive index of a transparent medium is the ratio of the speed of light in a vacuum to that in the medium. In case of a rectangular glass slab, the refraction takes place at both the air-glass interface and glass-air interface. The emergent ray is parallel to the direction of the incident ray. Lens formula gives the relationship between the object-distance, image-distance, and the focal length of a spherical lens. Power of a lens is the reciprocal of its focal length. The SI unit of power of a lens is dioptre.
Topics Covered in Class 10 Science Chapter 10 Light Reflection and Refraction for First Term:
Reflection of light by curved surfaces; Images formed by spherical mirrors, centre of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required), magnification. Refraction; Laws of refraction, refractive index.
Refraction of light by spherical lens; Image formed by spherical lenses; Lens formula (Derivation not required); Magnification. Power of a lens.
Also access the following resources for Class 10 Chapter 10 Light Reflection and Refraction at BYJU’S:
- CBSE Class 10 Science Chapter 10 Light – Reflection and Refraction Notes
- Chapter 10 -Light: Reflection and Refraction
- NCERT Exemplar Class 10 Science Solutions for Chapter 10 – Light Reflection And Refraction
Chapter 11 -The Human Eye and Colorful World – Term I
In the previous chapter, we learnt about light and some of its properties. In this chapter, we will study some of the optical phenomena in nature. The chapter also discusses the rainbow formation, splitting of white light and blue colour of the sky. The human eye is one of the most valuable and sensitive sense organs. It enables us to see the wonderful world and the colours around us. The ability of the eye to focus on both near and distant objects, by adjusting its focal length, is called the accommodation of the eye. The smallest distance, at which the eye can see objects clearly without strain, is called the near point of the eye or the least distance of distinct vision. For a young adult with normal vision, it is about 25cm. The common refractive defects of vision include myopia, hypermetropia and presbyopia. Myopia, short-sightedness-the image of distant objects is focused before the retina is corrected by using a concave lens of suitable power. Hypermetropia (far-sightedness-the image of nearby objects is focussed beyond the retina) is corrected by using a convex lens of suitable power. The eye loses its power of accommodation at old age. The splitting of white light into its component colours is called dispersion. Scattering of light causes the blue colour of the sky and the reddening of the Sun at sunrise and sunset.
Topics Covered in Class 10 Science Chapter 11 The Human Eye and Colorful World for First Term:
Refraction of light through a prism, dispersion of light, scattering of light, applications in daily life.
Also access the following resources for Class 10 Chapter 11 The Human Eye and Colorful World at BYJU’S:
- CBSE Class 10 Science Chapter 11 The Human Eye and the Colourful World Notes
- NCERT Exemplar Class 10 Science Solutions for Chapter 11 – Human Eye And Colourful World
Chapter 12 – Electricity – Term II
Electricity has an important place in modern society. It is a controllable and convenient form of energy for a variety of uses in homes, schools, hospitals, industries and so on. It is a phenomenon related to the flow of charge. A stream of electrons moving through a conductor constitutes an electric current. Conventionally, the direction of current is taken opposite to the direction of flow of electrons. The SI unit of electric current is ampere. To set the electrons in motion in an electric circuit, we use a cell or a battery. A cell generates a potential difference across its terminals. It is measured in volts (V). Resistance is a property that resists the flow of electrons in a conductor. It controls the magnitude of the current. The SI unit of resistance is Ohm. Ohm’s law: the potential difference across the ends of a resistor is directly proportional to the current through it, provided its temperature remains the same. The resistance of a conductor depends directly on its length, inversely on its areas of cross-section, and also on the material of the conductor. The equivalent resistance of several resistors in series is equal to the sum of their individual resistances. The electrical energy dissipated in a resistor is given by W=V x I x t. The unit of power is watt (W). One watt of power is consumed when 1 A of current flows at a potential difference of 1 V. The commercial unit of electrical energy is kilowatt-hour (kWh). 1kW h = 3,6000,000 J = 3.6 x 106 J.
Topics Covered in Class 10 Science Chapter 12 Electricity for Second Term:
Ohm’s law; Resistance, Resistivity, Factors on which the resistance of a conductor depends. Series combination of resistors, parallel combination of resistors and its applications in daily life. Heating effect of electric current and its applications in daily life. Electric power, Interrelation between P, V, I and R.
Also access the following resources for Class 10 Chapter 12 Electricity at BYJU’S:
Chapter 13 – Magnetic Effects of Electric Current – Term II
In this chapter students will study magnetic fields and such electromagnetic effects, along with electromagnets and electric motors which involve the magnetic effect of electric current, and electric generators, which involve the electric effect of moving magnets. A compass needle is a small magnet. Its one end, which points towards the north, is called a north pole, and the other hand, which points towards the south, is called a south pole. A magnetic field exists in the region surrounding a magnet in which the force of the magnet can be detected. Field lines are used to represent a magnetic field. A field line is a path along which a hypothetical free north pole would tend to move. The direction of the magnetic field at a point is given by the direction that a north pole placed at that point would take. Field lines are shown closer together where the magnetic field is greater. A metallic wire carrying an electric current has associated with it a magnetic field. The field lines about the wire consist of a series of concentric circles whose direction is given by the right-hand rule. The pattern of the magnetic field around a conductor due to an electric current flowing through it depends on the shape of the conductor. The magnetic field of a solenoid carrying a current is similar to that of a bar magnet. An electromagnet consists of a core of soft iron wrapped around with a coil of insulated copper wire. A current-carrying conductor, when placed in a magnetic field, experiences a force. If the direction of the field and that of the current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both and will be given by Fleming’s left-hand rule. This is the basis of an electric motor. An electric motor is a device that converts electric energy into mechanical energy.
The phenomenon of electromagnetic induction is the production of induced current in a coil placed in a region where the magnetic field changes with time. The magnetic field may change due to relative motion between the coil and a magnet placed near to the coil. If the coil is placed near a current-carrying conductor, the magnetic field may change either due to a change in the current through the conductor or due to the relative motion between the coil and conductor, the magnetic field may change either due to a change in the current through the conductor or due to the relative motion between the coil and the conductor. The direction of the induced current is given by Fleming’s right-hand rule. A generator converts mechanical energy into electrical energy. It works on the basis of electromagnetic induction. There are 2 types of generator AC and DC generator. Fuse is the most important safety device, used for protecting the circuits due to short-circuiting or overloading of the circuits.
Topics Covered in Class 10 Science Chapter 13 Magnetic Effects of Electric Current for Second Term:
Magnetic effects of current: Magnetic field, field lines, field due to a current carrying conductor, field due to current carrying coil or solenoid; Force on current carrying conductor, Fleming’s Left Hand Rule, Electric Motor, Electromagnetic induction. Induced potential difference, Induced current. Fleming’s Right Hand Rule.
Also access the following resources for Class 10 Chapter 13 Magnetic Effects of Electric Current at BYJU’S:
- CBSE Class 10 Science Chapter 13 Magnetic Effects of Electric Current Notes
- Revision Notes For Class 10 Science Chapter 13 – Magnetic Effects of Electric Current
- NCERT Exemplar Class 10 Science Solutions for Chapter 13 – Magnetic Effects Of Electric Current
Chapter 14 – Sources of Energy
Our energy requirements increase with our standard of living. In order to fulfil our energy requirements, we try to improve the efficiency of energy usage and also try and exploit new sources of energy. The chapter discusses different sources of energy and they are conventional sources of energy, which we keep on using for many years. It includes fossil fuels, thermal power plants and hydropower plants. The advantages and disadvantages are also discussed. After those improvements in the technology for using conventional sources of energy is also discussed such as Biomass and wind energy. Next, students will study the topic of alternative or non-conventional energy resources. It includes solar energy, in which energy is generated through the solar cell and solar panel. Energy can be generated from the sea such as Tidal energy, wave energy and ocean thermal energy. Energy can also be generated from the earth’s crust, known as geothermal energy. Nuclear energy is energy in the nucleus (core) of an atom. The energy source we select would depend on factors like the ease and cost of extracting energy from the source, the efficiency of the technology available for using that source of energy and the environmental impact of using that source. Many of the sources ultimately derive their energy from the Sun. All the topics are explained with the advantages and disadvantages of it.
Also access the following resources for Class 10 Chapter 14 Sources of Energy at BYJU’S:
- CBSE Class 10 Science Chapter 14 Sources of Energy Notes
- NCERT Exemplar Class 10 Science Solutions for Chapter 14 – Sources Of Energy
Chapter 15 – Our Environment – Term II
This chapter discusses how various components in the environment interact with each other and how we impact the environment. The various components of an ecosystem are interdependent. The producers make the energy from sunlight available to the rest of the ecosystem. There is a loss of energy as we go from one trophic level to the next, this limits the number of trophic levels in a food chain. The food-chain is explained in detail with examples according to nature, such as in the forest, in grassland and in the pond. Human activities have an impact on the environment. The use of chemicals like CFCs has endangered the ozone layer. Since the ozone layer protects against the ultraviolet radiation from the Sun, this could damage the environment. The waste we generate may be biodegradable or non-biodegradable. The disposal of the waste we generate is causing serious environmental problems.
Topics Covered in Class 10 Science Chapter 15 Our Environment for Second Term:
Our environment: Eco-system, Environmental problems, Ozone depletion, waste production and their solutions. Biodegradable and non-biodegradable substances.
Also access the following resources for Class 10 Chapter 15 Our Environment at BYJU’S:
- CBSE Class 10 Chapter 15 Our Environment Notes
- Revision Notes For Class 10 Science Chapter 15 – Our Environment
- Chapter 15 -Our Environment
- NCERT Exemplar Class 10 Science Solutions for Chapter 15 – Our Environment
Chapter 16 – Sustainable Management of Natural Resources – Only for Internal Assessment
In the previous class, we have learned about some natural resources like soil, air and water and how various components are cycled over and over again in nature. In this chapter, we will look at some of our resources and how we are using them. Our resources like forests, wildlife, water, coal and petroleum need to be used in a sustainable manner. We can reduce pressure on the environment by sincerely applying the maxim of ‘Refuse, Reduce, Reuse, Repurpose and Recycle’ in our lives. Management of forest resources has to take into account the interests of various stakeholders. The harnessing of water resources by building dams has social, economic and environmental implications. Alternatives to large dams exist. These are locale-specific and may be developed so as to give local people control over their local resources. The fossil fuels, coal and petroleum, will ultimately be exhausted. Owing to this and because their combustion pollutes our environment, we need to use these resources judiciously.
Topics Covered in Class 10 Science Chapter 16 Sustainable Management of Natural Resources for Internal Assessment:
Management of natural resources: Conservation and judicious use of natural resources. Forest and wild life; Coal and Petroleum conservation. Examples of people’s participation for conservation of natural resources. Big dams: advantages and limitations; alternatives, if any. Water harvesting. Sustainability of natural resources.
Also access the following resources for Class 10 Chapter 16 Sustainable Management of Natural Resources at BYJU’S:
- CBSE Class 10 Science Chapter 16 Sustainable Management of Natural Resources Notes
- Revision Notes For Class 10 Science Chapter 16 – Sustainable Management of Natural Resources
- NCERT Exemplar Class 10 Science Solutions for Chapter 16 – Management Of Natural Resources
CBSE Class 10 Science Evaluation Scheme (Theory) –
|Units||Term – I||Marks|
|I||Chemical Substances – Nature and Behaviour: Chapter 1, 2 and 3||16|
|II||World of Living: Chapter 6||10|
|III||Natural Phenomena: Chapter 10 and 11||14|
|Units||Term – II||Marks|
|I||Chemical Substances – Nature and Behaviour: Chapter 4 and 5||10|
|II||World of Living: Chapter 8 and 9||13|
|IV||Effects of Current: Chapter 12 and 13||12|
|V||Natural Resources: Chapter 15||05|
|Total Theory (Term I + II)||80|
|Internal Assessment: Term I||10|
|Internal Assessment: Term II||10|
How NCERT Solutions Class 10 Science are helpful while preparing for the exam?
Class 10 Science is an important subject for those students who want to pursue their future studies in this field. To score good marks in this subject, students need to follow the NCERT textbook of Class 10 Science and should be thorough with it. For each chapter, there will be exercise questions for practice which students need to write after they finish completing each topic. It will help them to revise the topics and get to know how much they have understood the concepts. After completing the exercise question they can refer to the NCERT Solutions of Class 10 Science to cross-check whether they answered all the questions correctly. These solutions work as a guide for the students so that they don’t repeat the mistakes and answer all the questions correctly.
Preparing for Class 10 exam needs a lot of attention and commitment as it is considered as the turning point of thier educational journey. Students need to have an overall understanding of individual chapters and the process of it demands hard work towards studies and an effective approach to get through the solutions. The significant role is played by Class 10 NCERT Science Solutions which help them to prepare effectively for their Class 10 board exams.
These solutions are based on the CBSE syllabus of Class 10 Science, which provides solutions to all the exercise questions of each chapter mentioned in the NCERT textbook of Class 10 Science. By referring to the solutions, students get to know which topic to focus more upon and will help students to learn faster. Students must know the right technique to answer all the questions given in the NCERT textbook of Class 10 Science. So, in order to help them prepare for their exams, we have provided all the chapter-wise NCERT Solutions. Students can also refer to the NCERT Workbook Solutions Class 10 Science for their further preparation.
Features of NCERT Class 10 Science Solutions
NCERT Science Solutions Class 10 is the best resource study material for students as it delivers a wide range of solutions to all the NCERT questions in the syllabus. It gives detailed solutions to the three dimensions of science, which are Physics, Chemistry and Biology. With the help of the solutions, students can instantly solve their doubts. These solutions are designed as per the NCERT curriculum to help students prepare for their Class 10 board exam. Some of the features of NCERT Solutions of Class 10 Science are mentioned below:
- The solutions are solved in easy to understand language so that students don’t get confused while referring to them.
- The answers are explained elaborately for all the exercise questions mentioned in each chapter.
- Solving these solutions will help students to solve the sample papers as well as the previous year question paper.
- It boosts up the student’s confidence level and also helps them work on their weak points.
- All the answers are explained with proper diagrams related to the question.
Other NCERT Resources for Class 10 Science
Students of Class 10 should refer to other study materials like NCERT Class 10 Science Exemplar, NCERT Class 10 Science textbook, NCERT Class 10 Science Syllabus besides studying from NCERT Class 10 Science Solutions. These study materials are also prepared as per the CBSE Class 10 science syllabus and help them while preparing for the board exams. Students can refer to these study materials after they complete the entire syllabus, which will help in quick revision before the exam.
Below we have provided the links of the other NCERT Resources for Class 10 Science to help you prepare effectively for the Class 10 board exam.
Download NCERT Solutions Class 10 Science Book APP
Students of Class 10 can download the NCERT Class 10 chapter wise Science solutions from the BYJU’S app which will help them while preparing for their exam. Apart from the NCERT Solutions for Class 10, students can also utilize the BYJU’S App for other study materials such as previous year question papers, syllabus, important questions, etc. The BYJU’S App will make your learning easier as you can access it from anywhere you want, by downloading it on your smart device. The solutions of NCERT Class 10 Science are prepared by our highly experienced subject experts, as per the latest CBSE Class 10 Science syllabus.
Frequently Asked Questions on NCERT Solutions for Class 10 Science
What are the chapters present in the NCERT Solutions for Class 10 Science?
Unit I – Chemical Substances – Nature & Behaviour (5 chapters)
Unit II – World of Living (4 chapters)
Unit III – Natural Phenomenon (2 chapters)
Unit IV – Effects of Current (2 chapters)
Unit V – Natural Resources (3 chapters).