Carbon Cycle fill in the blanks
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More CO2 is released in the atmosphere today than in the past because of the ____
burning of fossil fuels
In the past, huge deposits of carbon were stored as dead plants and animals ____
decayed
Too much CO2 in the atmosphere may be responsible for the ____ effect.
greenhouse
Another natural source for CO2 is ____
methane
The ____ is the main regulator of CO2 in the atmosphere because CO2 dissolves easily in it.
ocean
Today these deposits are burned as fossil fuels, which include ____, ____, and ____
oil, natural gas, and coal
Plants use CO2 in the process of ____ to make ____ and oxygen.
photosynthesis, sugar
Animals use oxygen in the process of ____ and make more CO2
respiration