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CBSE - Class 07 - Science - NCERT Solutions



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NCERT Solutions for Class 07 Science

Nutrition in Plants
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Nutrition in plants

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Nutrition in Animals
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Nutrition in animals
Fibre to Fabric (Deleted)
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Fibre to Fabric
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Acids Bases and Salts
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Acids, basis and salts
Physical and Chemical Changes
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Physical and chemical changes
Weather Climate and Adaptations of Animals to Climate (Deleted)
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Weather, climate and adaptations of animals
Winds Storms and Cyclones (Deleted)
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Winds, storms and cyclones
Soil (Deleted)
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Respiration in Organisms
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Respiration in organisms
Transportation in Animals and Plants
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Transportation in animal and plants
Reproduction in Plants
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Reproduction in plants
Motion and Time
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Motion and time
Electric Current and its Effects
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Electric current and its effects
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Water A Precious Resource (Deleted)
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Water a precious resource
Forests Our Lifeline
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Forest our lifeline
Waste water Story
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Wastewater story

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NCERT solutions for class 7 Science

NCERT Solutions for class 7 Science

NCERT 7 Science Text book Solutions

NCERT 7th class Science book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 7 Science chapter wise NCERT solution for Science book for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.

Course Structure for class 7 Science

- Questions : Food
Food from where
How do plants get their food?
Key concepts : Autotrophic and heterotrophic nutrition; parasites, saprophytes; photosynthesis.
Resources : Coleus or any other plant with variegated leaves, alcohol, iodine solution, kit materials.
Activities/processes : (Periods - 22) Need for light, green leaf for photosynthesis, looking at any saprophyte/parasite and noting differences from a green plant.

Questions : Utilization of food
How do plants and animals utilize their food?
Key concepts : Types of nutrition, nutrition in amoeba and human beings, Digestive system – human, ruminants; types of teeth; link with transport and respiration.
Resources : Model of human teeth, charts of alimentary canal, types of nutrition etc., chart and model of amoeba. The story of the stomach with a hole.
Activities/processes : Effect of saliva on starch, permanent slide of Amoeba. Role play with children.

- Questions : Materials
Materials of daily use
Do some of our clothes come from animal sources?
Which are these animals?
Who rears them? Which parts of the animals yield the yarn? How is the yarn extracted?
Key concepts : Wool, silk – animal fibers. Process of extraction of silk; associated health problems.
Resources : Samples of wool and silk; brief account of silkworm rearing and sheep breeding
Activities/processes : (Periods - 38) Collection of different samples of woolen and silk cloth. Activities to differentiate natural silk and wool from artificial fibers. Discussion.

Questions : What kinds of clothes help us to keep warm? What is heat?
What is the meaning of ‘cool’/‘cold’ and ‘warm’ ‘hot’?
How does heat flow from/to our body to/ from the surroundings?
Key concepts : Heat flow; temperature.
Resources : Potassium permanganate, metal strip or rod, wax, common pins, spirit lamp, matches, tumblers, Thermometer etc.
Activities/processes : Experiment to show that ‘hot’ and ‘cold’ are relative. Experiments to show conduction, convection and radiation. Reading a thermometer.

Questions : Different kinds of materials
Why does turmeric stain become red on applying soap?
Key concepts : Classification of substances into acidic, basic and neutral; indicators
Resources : Common substances like sugar, salt, vinegar etc., test tubes, plastic vials, droppers, etc.
Activities/processes : Testing solutions of common substances like sugar, salt, vinegar, lime juice etc. with turmeric, litmus, China rose. Activity to show neutralization.

Questions : How things change/ react with one another
What gets deposited on a tawa/khurpi /kudal if left in a moist state?
Why does the exposed surface of a cut brinjal become black?
Key concepts : Chemical substances; in a chemical reaction a new substance is formed.
Resources : Test tubes, droppers, common pins, vinegar, baking powder, CuSO4 , etc.
Activities/processes : Experiments involving chemical reactions like rusting of iron, neutralization (vinegar and baking soda), displacement of Cu from CuSO4 etc. Introduce chemical formulae without explaining them.

Questions : Why is seawater salty? Is it possible to separate salt from seawater?
Key concepts : Substances can be separated by crystallization.
Resources : Urea, copper sulphate, alum etc., beaker, spirit lamp, watch glass, plate, Petridis etc.
Activities/processes : Making crystals of easily available substances like urea, alum, copper sulphate etc. using supersaturated solutions and evaporation.

- Questions : The World of the Living
Surroundings affect the living
Why are nights cooler? How does having winters and summers affect soil? Are all soils similar? Can we make a pot with sand? Is soil similar when you dig into the ground? What happens to water when it falls on the cemented/ bare ground?
Key concepts : Climate, soil types, soil profile, absorption of water in soil, suitability for crops, adaptation of animals to different climates.
Resources : Data on earth, sun – size, distance etc., daily changes in temperature, humidity from the newspaper, sunrise, sunset etc.
Activities/processes : (Periods - 42) Graph for daily changes in temperature, day length, humidity etc.; texture of various soils by wetting and rolling; absorption / percolation of water in different soils, which soil can hold more water.

Questions : The breath of life
Why do we/animals breathe?
Do plants also breathe?
Do they also respire? How do plants/ animals live in water?
Key concepts : Respiration in plants and animals.
Resources : Lime water, germinating seeds, kit materials.
Activities/processes : Experiment to show plants and animals respire; rate of breathing; what do we breathe out? What do plants ‘breathe’ out? Respiration in seeds; heat release due to respiration. Anaerobic respiration, root respiration.

Questions : Movement of substances
How does water move in plants?
How is food transported in plants? Why do animals drink water?
Why do we sweat? Why and how is there blood in all parts of the body?
Why is blood red?
Do all animals have blood?
What is there in urine?
Key concepts : Herbs, shrubs, trees; Transport of food and water in plants; circulatory and excretion system in animals; sweating.
Resources : Twig, stain; improvised stethoscope; plastic bags, plants, egg, sugar, salt, starch, Benedicts solution, AgNO3 solution
Activities/processes : Translocation of water in stems, demonstration of transpiration, measurement of pulse rate, heartbeat; after exercise etc. Discussion on dialysis, importance; experiment on dialysis using egg membrane.

Questions : Multiplication in plants
Why are some plant parts like potato, onion swollen – are they of any use to the plants? What is the function of flowers?
How are fruits and seeds formed?
How are they dispersed?
Key concepts : Vegetative, asexual and sexual reproduction in plants, pollination - cross, self-pollination; pollinators, fertilization, fruit, seed.
Resources : Bryophyllum leaves, potato, onion etc.; yeast powder, sugar.
Activities/processes : Study of tuber, corm, bulb etc.; budding in yeast; T.S./ L.S. ovaries, w.m.pollen grains; comparison of wind pollinated and insect pollinated flowers; observing fruit and seed development in some plants; collection and discussion of fruits/seeds dispersed by different means.

- Questions : Moving Things, People and Ideas
Moving objects
Why do people feel the need to measure time? How do we know how fast something is moving?
Key concepts : Appreciation of idea of time and need to measure it. Measurement of time using periodic events. Idea of speed of moving objects – slow and fast motion along a straight line.
Resources : Daily-life experience; meter scale, wrist watch/ stop watch, string etc.
Activities/processes : (Periods - 16) Observing and analyzing motion (slow or fast) of common objects on land, in air, water and space. Measuring the distance covered by objects moving on a road in a given time and calculating their speeds. Plotting distance vs. time graphs for uniform motion. Measuring the time taken by moving objects to cover a given distance and calculating their speeds. Constancy of time period of a pendulum.

Questions : How Things Work
Electric current and circuits
How can we conveniently represent an electric circuit?
Why does a bulb get hot?
How does a fuse work? How does the current in a wire affect the direction of a compass needle?
What is an electromagnet?
How does an electric bell work?
Key concepts : Electric circuit symbols for different elements of circuit.
Heating effect of current.
Principle of fuse.
A current-carrying wire has an effect on a magnet.
A current-carrying coil behaves like a magnet. Working of an electric bell.
Resources : Recollection of earlier activities.
Pencil and paper. Cells, wire, bulb.
Cells, wire, bulb or LED, aluminum foil.
Wire, compass, battery.
Coil, battery, iron nail. Electric bell.
Activities/processes : Drawing circuit diagrams.
Activities to show the heating effect of electric current. Making a fuse.
Activity to show that a current-carrying wire has an effect on a magnet.
Making a simple electromagnet. Identifying situations in daily life where electromagnets are used.
Demonstration of working of an electric bell.

- Questions : Natural Phenomena
Rain, thunder and lightning
What causes storms? What are the effects of storms?
Why are roofs blown off?
Key concepts : High-speed winds and heavy rainfall have disastrous consequences for human and other life.
Resources : Experience; newspaper reports. Narratives/stories
Activities/processes : (Periods - 24) Making wind speed and wind direction indicators. Activity to show “lift” due to moving air. Discussion on effects of storms and possible safety measures.

Questions : Light
Can we see a source of light through a bent tube?
Key concepts : Rectilinear propagation of light
Resources : Rubber/plastic tube/ straw, any source of light.
Activities/processes : Observation of the source of light through a straight tube, a bent tube.

Questions : How can we throw sunlight on a wall?
Key concepts : Reflection, certain surfaces reflect light.
Resources : Glass/metal sheet/metal foil, white paper.
Activities/processes : Observing reflection of light on wall or white paper screen

Questions : What things give images that are magnified or diminished in size?
Key concepts : Real and virtual images.
Resources : Convex/concave lenses and mirrors.
Activities/processes : Open ended activities allowing children to explore images made by different objects, and recording observations. Focused discussions on real and virtual images

Questions : How can we make a colored disc appear white?
Key concepts : White light is composed of many colors.
Resources : Newton’s disc.
Activities/processes : Making the disc and rotating it.

- Questions : Natural Resources
Scarcity of water Where and how do you get water for your domestic needs?
Is it enough?
Is there enough water for agricultural needs? What happens to plants when there is not enough water for plants?
Where does a plant go when it dies?
Key concepts : Water exists in various forms in nature. Scarcity of water and its effect on life.
Resources : Experience; media reports; case material.
Activities/processes : Discussions.
Case study of people living in conditions of extreme scarcity of water, how they use water in a judicious way.
Projects exploring various kinds of water resources that exist in nature in different regions in India; variations of water availability in different regions.

Questions : Forest products
What are the products we get from forests? Do other animals also benefit from forests? What will happen if forests disappear?
Key concepts : Interdependence of plants and animals in forests. Forests contribute to purification of air and water.
Resources : Case material on forests.
Activities/processes : Case study of forests.

Questions : Waste Management
Where does dirty water from your house go?
Have you seen a drain? Does the water stand in it sometimes?
Does this have any harmful effect?
Key concepts : Sewage; need for drainage/sewer systems that are closed.
Resources : Observation and experience; photographs.
Activities/processes : Survey of the neighborhood, identifying locations with open drains, stagnant water, and possible contamination of ground water by sewage. Tracing the route of sewage in your building, and trying to understand whether there are any problems in sewage disposal.

Here is the list of topics covered under each chapter of class 7 Science NCERT text book.

  • Nutrition in Plants
  • Nutrition in Animals
  • Fibre To Fabric
  • Heat
  • Acids Bases And Salts
  • Physical And Chemical Changes
  • Climate
  • Winds Storms And Cyclones
  • Soil
  • Respiration In Organisms
  • Transportation in Animals And Plants
  • Reproduction In Plants
  • Motion And Time
  • Electric Current And Its Effects
  • Light
  • Water
  • Forests: Our Lifeline
  • Waste Water Story

NCERT Solutions for Class 7th Science

NCERT Solutions Class 7 Science PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 7 Science includes text book solutions. NCERT Solutions for CBSE Class 7 Science have total 18 chapters. Class 7 Science ncert Solutions in pdf for free Download are given in this website. Ncert Science class 7 solutions PDF and Science ncert class 7 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide.

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