Carbon Cycle
What process do plants use to make sugar and oxygen?
Photosynthesis
Where is phosphorus mostly contained?
In rocks and minerals
What cannot directly use all of the nitrogen in the atmosphere?
Animals and Plants
Name the processes of the water cycle.
Evaporation, condensation, precipitation, collection
Name one natural source for CO2.
Volcanoes
What important chemical does phosphorus make up?
DNA
How much of our atmosphere is nitrogen?
78%
Does water that is precipitating always end up back in the same place?
No
How does human activity interact with the carbon cycle?
By putting out CO2 by burning fossil fuels
What can too much phosphorus in water lead to?
Plant overgrowth
Protein
Why is acid rain as prevalent as it is now?
Human activity and pollution has caused acid rain to be as common as it is now
What is too much CO2 in the air responsible for?
Greenhouse Effect
How does the biological classification play into the phosphorus cycle?
Phosphorus moves between soil and plants, which are eaten by animals, the animals use the phosphorus, and their waste returns the sulfur to help the next generation of phosphorus in the soil
How do humans add nitrogen to water ways?
Fertilizers run off into water ways
When does acid rain occur?
What is the photosynthesis equation?
6CO2+6H2O -> C6H12O6+6O2
Where, having to do with human activity, can phosphorus in the water come from?
Man-made pollution
What type of bacteria can break down ammonia into the gaseous form of nitrogen?
Denitrification bacteria
How can acid rain be harmful?
It has a lower PH that can make organisms sick