RS: Carbon and Nitrogen Cycles

Front

What does it mean that Earth is a closed system?

Back

All the matter we have is all we will ever have, ignoring minor additions from meteors.

Front

How does water exit the bodies of living things?

Back

Through transpiration in plants and respiration in animals

Front

What percentage of the mass of animals does carbon make up?

Back

20 percent

Front

What is the main source of energy for living things?

Back

Glucose

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

Front

Through what process do plants take in carbon dioxide and water to make glucose?

Back

Photosynthesis

Tags

NGSS.MS-LS1-6

Front

What percentage of the atmosphere is made up of nitrogen?

Back

80 percent

Front

How can plants absorb nitrogen?

Back

With the help of bacteria converting it into nitrates and ammonium

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Front

What is a key element in proteins and DNA?

Back

Nitrogen

Front

How does carbon exit the biosphere?

Back

By cellular respiration releasing carbon dioxide

Front

What role do decomposers play in the nitrogen cycle?

Back

They break down organic materials, releasing nitrogen gas back into the atmosphere.