Carbon Cycle

Label the following Carbon cycle.

a

b

c

d

fossil fuels

sunlight

photosynthesis

animals respiring

How does the carbon in grass become part of a lion?

• The lion eats the grass

• Carbon from grass doesn't end up in a lion. 

• The carbon ends up in the lion's food chain. 

• The lion breathes in carbon given out by the plant

Why does too much carbon dioxide in the atmosphere cause climate change?

• It cools down our planet
• It blocks out UV rays
• It traps heat and warms up our planet
• It lets sunlight escape

Label each arrow shown in the Carbon Cycle in this diagram.

a

b

c

d

CO2 returns to the atmosphere

CO2 is absorbed by plants.

Plants and animals die and decompose.

Plants are consumed by animals.

Decomposition of a dead plant moves carbon from the ​ (a)   to the ​ (b)   .

• biosphere
• geosphere
• atmosphere
• cryosphere
• hydrosphere
• anthroposphere

Water evaporates and is collected in clouds. This is primarily an interaction between which of Earth's spheres? ​ ​

• Hydrosphere
• Geosphere
• Atmosphere
• Biosphere
• Anthroposphere

Trees and other plants gain mass by

• collecting nutrients from the soil.

• collecting carbon from the atmosphere.

• pulling from water sources.

• leaching nutrients from subsurface rocks.

A landslide has occured, changing the habitat of mountain animals. This is primarily an interaction between which of Earth's spheres? ​ ​

• Hydrosphere
• Geosphere
• Atmosphere
• Biosphere
• Anthroposphere