What layer of the earth do we live on?
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Crust
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Lithosphere
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Mantle
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Core
Which gas is responsible for global warming?
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Carbon dioxide
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Nitrogen
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Lead
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Oxygen
What is the main cause of deforestation?
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Rainfall
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Natural growth
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Tree planting
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Logging and agriculture
Which of the following is a renewable source?
What percentage of Earth's surface is covered by water?
Which gas do tree absorb from the atmosphere?
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Methane
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Oxygen
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Carbon dioxide
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Nitrogen
Which of the following is a major threat to Earth's biodiversity?
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Recycling
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Habitat destruction
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Organic farming
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Composition
What is the Earth's primary source of energy?
Which of these helps in reducing soil erosion?
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Deforestation
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Over grazing
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Planting trees
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Urbanisation
What is the term for the variety of life on the earth?
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Ecology
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Evolution
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Photosynthesis
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Biodiversity
