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The amount of CO2 in the air was decreased and levels of O2 rose because blue-green algae (cyanobacteria) used the CO2 to form carbohydrates by means of the Calvin cycle and replaced it with O2 as a product of photosynthesis
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What must be done to carbon dioxide gas to change it to solid?
the cold air can change the carbon dioxide gas to a solid
What changes carbon dioxide gas back into carbon in a solid form?
the cold air can change the carbon dioxide gas to a solid
Which increase in atmospheric carbon dioxide contributes to global climate change?
Any increase in atmospheric carbon dioxide contributes to global climate change.
We inhale oxygen and exhale carbon dioxide as a result of a change in our bodies. a. physical b. chemical?
We inhale oxygen and exhale carbon dioxide as a result of a change in our bodies. Answer - Chemical Change
Is Carbon dioxide filled with balloon a chemical change?
No. helium is released in outer air but does not lose or change its chemical formula
Is freezing carbon dioxide a chemical change or physical change?
Frozen carbon dioxide is still carbon dioxide, so it is a physical change.
Does plants change carbon monoxide to carbon dioxide?
plants do not change carbon monoxide into carbon dioxide. they, on the other hand, convert carbon dioxide in to oxygen.
What colour would Carbon dioxide change limewater to?
Carbon dioxide.
Which organs are oxygen and carbon dioxide changed?
Oxygen and carbon dioxide change in the lungs.
What must be done to carbon dioxide gas to change it to solid?
the cold air can change the carbon dioxide gas to a solid
If you could break up a carbon dioxide molecule would you still have carbon dioxide?
Although the molecule is broken up it does not change the fact that it is carbon dioxide. Therefore you still have carbon dioxide.
What changes carbon dioxide gas back into carbon in a solid form?
the cold air can change the carbon dioxide gas to a solid
Which increase in atmospheric carbon dioxide contributes to global climate change?
Any increase in atmospheric carbon dioxide contributes to global climate change.
Is carbon dioxide a reversable or irreversible reaction?
This is a reversible change as it involves a change in the state of a substance. Also, by applying pressure and lowering the temperature, gases carbon dioxide can be converted back into dry ice.
Is combining carbon dioxide and water to make sugar a physical change?
Combining carbon dioxide and water is a chemical change, not a physical change, but it doesn't make sugar. Carbon dioxide and water makes carbonic acid. CO2 + H2O <--> H2CO3-->H+ + HCO3-
Why does carbon dioxide change colors of indicator?
Carbon dioxide is acidic in nature. With water, it partially forms carbonic acid.
How does the carbon in coal become part of the carbon dioxide in the air?
When coal is burnt the chemical change combines carbon from the coal with oxygen from the air to produce carbon dioxide.
