water cycle
water falls to groung from clouds
Precipitation
Too much phosphorus leads to
Phosphorus overgrowth
Our atmosphere is how much nitrogen
78%
How do plants use CO2
Photosynthesis
Water in ground in the water cycle
Groundwater
Phosphorus is mainly in (2)
Rocks and minerals
True or false: animals can’t directly use all the nitrogen in the atmosphere
True
How do animals use oxygen to make more CO2?
Respiration
water molecules being raised up to the sky in the water cycle
Evaporation
Source of phosphorus in water
Man-made pollution
What bacteria can directly use nitrogen in our atmosphere and “fix“ it so other organisms can benefit
Nitrogen-fixing
What is an example of a fossil fuel?
Coal, oil, natural gas
Water molecules making clouds
Condensation
What in animals returns the sulfur to the next generation of phosphorus in the soil?
Waste
What bacteria in the soil can break down ammonia which is not available for use by plants or animals
Dentrification bacteria
Why is more CO2 released now than in the past?
Burning fossil fuels
what do humans contribute to in the water cycle
Acid rain
Why is the use of too much phosphorus-rich fertilizers bad for the environment?
It provides too much phosphorus which overgrows the plants which then struggle for sufficient nutrition
What does animal waste decay by the action of bacteria make (two things)
Ammonia and nitrate
What is the photosynthesis equation?
6CO2 + 6H2O -> C6H12O6 + O2