Biogeochemical Cycles

Front

Which is NOT a process of the water cycle? Options: precipitation, freezing, transpiration, evaporation

Back

freezing

Front

The process of plants losing water through their leaves is called ____.

Back

transpiration

Front

What is the most abundant gas in the atmosphere? Options: hydrogen, oxygen, helium, nitrogen

Back

nitrogen

Front

Nitrogen that is not combined with other elements and found in the atmosphere as gas is

Back

free nitrogen

Front

The type of nitrogen that can be used by producers is called _____ (Options: free nitrogen, nitrous oxide, nitrogen gas, nitrogen compounds).

Back

nitrogen compounds

Front

Why do living things need nitrogen?

Back

To make proteins AND amino acids

Front

What are the swellings found on the roots of legumes called?

Back

nodules

Front

Where are denitrifying bacteria found?

Back

In the soil

Front

Where are nitrogen-fixing bacteria found? Options: In the soil, Root nodules, In dead things, In the atmosphere

Back

Root nodules

Front

What happens during the process of nitrogen-fixation?

Back

Free nitrogen turns into nitrogen compounds