Fall
What is photosynthesis?
A chemical reaction that produces H2O and glucose
What is the carbon cycle?
The movement of carbon from the nonliving environment into living things and back
Plants and tress
What are some things that cause the release of CO2?
Combustion, decomposition, respiration
Decomposing is...
breaking down living organisms
What is the thing that can both add and take away CO2 from the atmosphere?
diffusion
What releases carbon into the atmosphere?
Burning fossil fuels, burning coal, burning plants
What process do trees and plants go through when you burn them?
combustion
This process happens in all living things and adds carbon dioxide into the air.
Cellular respiration
This process is when fossil fuels are burned, adding CO2 to the atmosphere.
Combustion
The breakdown of dead plants and animals is known as:
decomposition
True or False: Plants and animals can use nitrogen by breathing it in
False
What is nitrogen fixation?
When bacteria change nitrogen into a form plants and animals can use
How do humans and animals get nitrogen?
By consuming food with nitrogen
What decomposes and transforms nitrogen through the nitrogen cycle in an aquarium?
Bacteria
What is the process of where nitrates go back to nitrogen gas?
Denitrification
a. atmosphere
b. biosphere
c. exosphere
biosphere
Plants are called ___________ because they make their own food.
Producers
Carbon dioxide is released back into the atmosphere when we burn ____________.
fossil fuels
The movement of carbon between the atmosphere, land, and oceans is called ......
carbon cycle
The majority of nitrogen is found in the ...
atmosphere
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
Explain a path of the nitrogen cycle.
atmosphere, roots, soil, plant, animal, soil, atmosphere
A pyramid of ______________ shows the distribution of energy among tropic levels.
energy
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%