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Fall
Pumpkins
Leaves
Pie
Coffee
100

What is photosynthesis?

A chemical reaction that produces H2O and glucose

100

What is the carbon cycle?

The movement of carbon from the nonliving environment into living things and back

100
What takes carbon dioxide out of the atmosphere?

Plants and tress

100

What are some things that cause the release of CO2?

Combustion, decomposition, respiration 

100

Decomposing is...

breaking down living organisms

200

What is the thing that can both add and take away CO2 from the atmosphere? 

diffusion

200

What releases carbon into the atmosphere? 

Burning fossil fuels, burning coal, burning plants

200

What process do trees and plants go through when you burn them? 

combustion

200

This process happens in all living things and adds carbon dioxide into the air.

Cellular respiration 

200

This process is when fossil fuels are burned, adding CO2 to the atmosphere. 

Combustion

300

The breakdown of dead plants and animals is known as: 

decomposition 

300

True or False: Plants and animals can use nitrogen by breathing it in

False

300

What is nitrogen fixation? 

When bacteria change nitrogen into a form plants and animals can use

300

How do humans and animals get nitrogen?

By consuming food with nitrogen

300

What decomposes and transforms nitrogen through the nitrogen cycle in an aquarium?

Bacteria

400

What is the process of where nitrates go back to nitrogen gas? 

Denitrification 

400
The carbon cycle is the pathway through which carbon is recycled in the ____________. 

a. atmosphere

b. biosphere

c. exosphere

biosphere

400

Plants are called ___________ because they make their own food. 

Producers

400

Carbon dioxide is released back into the atmosphere when we burn ____________.

fossil fuels

400

The movement of carbon between the atmosphere, land, and oceans is called ......

carbon cycle

500

The majority of nitrogen is found in the ...

atmosphere

500

The most important organisms in the nitrogen cycle is __________. This organism helps convert nitrogen in the air into usable nitrogen that other organisms can use. 

Bacteria

500

Explain a path of the nitrogen cycle.

atmosphere, roots, soil, plant, animal, soil, atmosphere

500

A pyramid of ______________ shows the distribution of energy among tropic levels.

energy

500

The total energy transfer from one trophic level to the next is about _____ percent or less.

a. 10%

b. 100%

c. 50%

d. 25%

10%