Cycles Worksheet

11 September 2022
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22 test answers
question
Plants use CO2 in the process of _______ to make _______ and _______.
answer
Photosynthesis/Sugar/Oxygen
question
Animals use oxygen in the process of _______ to make more CO2
answer
Respiration
question
The _______ is the main regulator of CO2 in the atmosphere because CO2 dissolves easily in it.
answer
Ocean
question
In the past, huge deposits of carbon were stored as dead plants and animals ________
answer
Decayed
question
Today these deposits are burned as _______, which include _______,_______,_______
answer
Fossil fuels / coal/ natural gas / oil
question
More CO2 is released in the atmosphere today than in the past because of _____________.
answer
Burning of fossil fuels
question
Another natural source of CO2 is _______.
answer
Volcanoes
question
Too much CO2 in the atmosphere may be responsible for the ______________.
answer
Greenhouse effect
question
Plants release 430-470 billion tons of oxygen during the process of ________.
answer
Photosynthesis
question
Atmospheric Oxygen in the form of ______ provides protection from harmful ultra violet rays.
answer
Ozone
question
Oxygen is found everywhere on Earth, from the Earths _______ to the _______ where it is dissolved
answer
Crust; Ocean
question
Oxygen is vital for _______ by animals, a process which produces CO2 and water
answer
Respiration
question
Oxygen is also necessary for the decomposition of _______ into other elements necessary for life
answer
Waste
question
Phosphorus makes up important chemicals such as _____
answer
DNA
question
Too much phosphorus in water leads to.....
answer
Overgrowth
question
Our atmosphere is ____% nitrogen gas
answer
78
question
Animals and plants cannot directly use all the nitrogen found in our _________
answer
Atmosphere
question
Only special bacteria can directly use nitrogen in our atmosphere and fix it so other organisms can benefit. Called....
answer
Nitrogen fixing bacteria
question
Higher organisms use nitrogen to make their....
answer
Proteins
question
Animal waste decay by the action of bacteria which create _______ and _______ products rich in nitrogen and you school for plants to use again
answer
Ammonia and nitrate
question
__________ bacteria in the soil can break down the ammonia into the gases form of nitrogen which is not available for use by plants or animals
answer
Denitrificating
question
And another part of the cycle animals eat______containing nitrogen which is again returned to the soil by animal ______ or decaying _______ and ______
answer
Plants; waste; plants; animals
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question
Plants use CO2 in the process of _______ to make _______ and _______.
answer
Photosynthesis/Sugar/Oxygen
question
Animals use oxygen in the process of _______ to make more CO2
answer
Respiration
question
The _______ is the main regulator of CO2 in the atmosphere because CO2 dissolves easily in it.
answer
Ocean
question
In the past, huge deposits of carbon were stored as dead plants and animals ________
answer
Decayed
question
Today these deposits are burned as _______, which include _______,_______,_______
answer
Fossil fuels / coal/ natural gas / oil
question
More CO2 is released in the atmosphere today than in the past because of _____________.
answer
Burning of fossil fuels
question
Another natural source of CO2 is _______.
answer
Volcanoes
question
Too much CO2 in the atmosphere may be responsible for the ______________.
answer
Greenhouse effect
question
Plants release 430-470 billion tons of oxygen during the process of ________.
answer
Photosynthesis
question
Atmospheric Oxygen in the form of ______ provides protection from harmful ultra violet rays.
answer
Ozone
question
Oxygen is found everywhere on Earth, from the Earths _______ to the _______ where it is dissolved
answer
Crust; Ocean
question
Oxygen is vital for _______ by animals, a process which produces CO2 and water
answer
Respiration
question
Oxygen is also necessary for the decomposition of _______ into other elements necessary for life
answer
Waste
question
Phosphorus makes up important chemicals such as _____
answer
DNA
question
Too much phosphorus in water leads to.....
answer
Overgrowth
question
Our atmosphere is ____% nitrogen gas
answer
78
question
Animals and plants cannot directly use all the nitrogen found in our _________
answer
Atmosphere
question
Only special bacteria can directly use nitrogen in our atmosphere and fix it so other organisms can benefit. Called....
answer
Nitrogen fixing bacteria
question
Higher organisms use nitrogen to make their....
answer
Proteins
question
Animal waste decay by the action of bacteria which create _______ and _______ products rich in nitrogen and you school for plants to use again
answer
Ammonia and nitrate
question
__________ bacteria in the soil can break down the ammonia into the gases form of nitrogen which is not available for use by plants or animals
answer
Denitrificating
question
And another part of the cycle animals eat______containing nitrogen which is again returned to the soil by animal ______ or decaying _______ and ______
answer
Plants; waste; plants; animals