Water
what is water called when its soaked into the ground?
groundwater
how do animals obtain nitrogen?
by eating plants and other animals
what causes water to turn into vapor?
the sun
explain why bacteria is important in the nitrogen cycle.
bacteria are essential to fixing the nitrogen so it can be used by plants
why is the ocean salty?
ground water picks up salt and minerals and carries it into the water
what biological processes is not linked to the nitrogen cycle?
condensation
what is it called when water goes through the plant and turns into water vapor?
evaporation
What percentage of air is nitrogen?
79%
where is the purest water on earth found?
glaciers and ice caps
What is the main way that fixed nitrogen is released back into the atmosphere?
Denitrifying microbes