Biogeochemical Cycles (Biogeochemical Cycles)

The non-living parts of an ecosystem are called

• Abiotic

• Biotic

True of False

Matter is like energy in that it follows a one way path through the ecosystem and cannot be recycled.

• False

• True

The C in CHNOPS stands for what?

• Carbon

• Chrome

• Creatine

Energy (always starting with the sun) is eventually

• recycled

• lost

The carbon returns in the form of what compound?

• carbon monoxide

• carbon dioxide

True or false: Carbon that is trapped underground becomes fossil fuels. 

• True

• False

Bacteria convert the nitrogen in the atmosphere into_______.

• Usable nitrogen

• Non-usable nitrogen

True or False

Plants and animals can also use the nitrogen naturally found in the atmosphere.

• True

• False

The process where bacteria takes nitrogen out of the air and makes it usable for other organisms is called

• the nitrogen cycle

• nitrogen addition

• nitrogen fixation

What is eutrophication?

• The process by which soil dwelling bacteria fix nitrogen into a form we can use.

• Nitrates and nitrites cause an abundance of algae ultimately causing a reduction of oxygen.