Ecology: Question Preview (ID: 6339)

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78% of the air consists of
a) Nitrogen gas b) Oxygen gas c) Carbon Dioxide d) Dust
a) break down molecules in dead organisms b) create gases in the atmosphere c) smell good d) regenerate
a) are changed into nitrogen gas by bacteria b) are changed into nitrogen gas by the nucleus c) are changed into nitrogen gas by cells d) are changed into nitrogen gas by the sun
Carbon in dead organisms decomposes and turns into
a) fossil fuels b) carbon dioxide c) nitrogen d) oxygen
On major reservoir of carbon dioxide is the
a) ocean b) grass c) mountains d) puddles
_______ is where plants turn carbon dioxide into energy rich carbon
a) Photosynthesis b) Maturation c) Regeneration d) Global warming
The main energy sournce of the water cycle comes from the
a) sun b) earth c) water d) air
Plants give off water into the atmosphere by the process called
a) transpiration b) transformation c) dialation d) reflection
The processes of the water cycle are a _________ change
a) physical b) chemical c) mixed d) reactive
Plants _____ the nitrates
a) use b) release c) mix d) form
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