The Carbon Cycle
The Nitrogen Cycle
Energy
Food chains and webs
Miscellaneous
100
Carbon in the atmosphere is mainly in this form
What is carbon dioxide
100
Nitrogen is important for living things chiefly because it is the distinguishing element in this type of compound
What is protein
100
Humans get energy from
What is food
100
Each level in a food chain represents what in a pyramid?
What is a trophic level
100
These organisms make their own food, most through photosynthesis
What are producers or autotrophs?
200
This is one process that takes carbon dioxide out of the atmosphere
What is photosynthesis (or precipitation)
200
Nitrogen is taken up by producers, reused by consumers, and then released by...
What is excretion and decomposition
200
Plants get energy from
What is photosynthesis
200
Phytoplankton would be classified this way
What is a producer
300
Carbon in carbon dioxide is released by these in the C cycle
What are animals
300
These organisms are critically important to the Nitrogen cycle
What are bacteria
300
This is the ultimate energy source for our world
What is the Sun?
300
Give an example of a second-order consumer in an aquatic ecosystem
What is a squid, a large fish or a shark
300
Zooplankton would be this
What are herbivores
400
This is one way humans put carbon dioxide back into the atmosphere other than respiration
What are burning fossil fuels and other industries
400
True or False: Humans get nitrogen that we need from the atmosphere
What is False
400
Second order consumers get their energy from
What is first order consumers
400
Zooplankton eat this
What is phytoplankton
400
Each step in an ecological pyramid represents thi
What is a trophic level
500
This is a place on Earth where C is taken out of the C cycle and stored usually for long periods of time
What is a Carbon sink
500
This is the process by which bacteria fix nitrogen to the roots of plants and into important molecules such as nitrates
What is nitrification
500
Krill are a source of energy for
What is second-order consumers
500
A carnivore would get more energy if it ate higher or lower on the food chain
What is lower
500
This amount of energy transfers up an ecological pyramid
What is 10%
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