Water and oxygen
What covers most of earth?
Water
Plants use what for photosynthesis?
Carbon dioxide
During the water cycle, when the water goes back up, what happens to the water?
The water evaporates and becomes oxygen
Lighting and what covert nitrogen into usable forms?
Bacteria
Carbon only enters what then receiving the atmosphere?
Plants
What is condensation?
Water vapors form droplets.
Plants can do what now because of nitrogen?
absorb soil
Organism use what to store energy?
carbohydrates
What is precipitation
Precipitation is when droplets get large enough, they fall to earth as either rain, snow, or hail.
Some nitrogen-fixing can live in where?
In free soil
What is released into the human atmosphere?
Human,volcanic,decomposition,and respiration activity.
Give me the absolute definition of percolation.
When water deeply soaks into the ground and become groundwater.
how much does nitrogen make of air?
78%
Carbon cycle is a process of what?
when carbon goes between the atmosphere,land, and water