Foundation Doc: Carbon/Nitrogen Cycles

___________ is absorbed by _____________ from the air as CO₂.

• Nitrogen, plants

• Nitrogen, living things

• Carbon, plants

• Carbon, living things

Carbon is passed through the food chain as ___________ and other organic molecules.

• sugars

• starches

• proteins

• nucleic acids

Carbon is stored in Earth's __________ (living things).

• carbon dioxide

• carboxyl groups

• abiotics

• biota

What is a reservoir?

• another word for reservation

• a supply or source of something/a large area for storage

• when someone has some concerns about an activity

• a lack of something needed

Carbon is stored in ___________ like limestone.

• mountains

• rocks

• oceans

• trees

Carbon is dissolved in the _____________ and found in ocean sediments.

• ocean

• river

• lake

• stream

Carbon is stored in ___________ _________ like coal, oil, and natural gas.

• nucleic acids

• hard rocks

• fossil fuels

• large oceans

Carbon is released into the atmosphere through _______________.

• respiration

• transpiration

• evaporation

• metabolism

______________ fossil fuels releases carbon into the atmosphere.

• Throwing

• Running

• Canvasing

• Burning

____________ _________________ releases carbon into the atmosphere.

• Cement reduction

• Cement production

• Cement respiration

• Cement destruction