Please select a subject first
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What gases does air contain?
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Name the gases that are found in the air along with their percentage.
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Why is oxygen essential?
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How is carbon dioxide useful?
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How does an air conditioner help?
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name five resources which we get from the earth.
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What does subsoil contain?
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What are minerals?
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List any four minerals.
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What type of resources are minerals?
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How do forests retain water?
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What is meant by deforestation?
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What happens when fossil fuels are burnt?
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List the inexhaustible sources of energy.
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Which places in India can be used for tidal power generation?
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How many biogas plants have been set up in India under the National Biogas Development Programme?
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What is geothermal energy ? Give examples of geothermal energy.
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How is groundwater formed?
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List the advantages and disadvantages of solar energy.
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What is the hydrological cycle?
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