1. What inorganic molecule is carbon normally found in? CO2
2. Name an organic molecule that carbon is found in. GLUCOSE,
CARBOHYDRATES, LIPIDS, PROTEINS, DNA
Name _________________________
Carbon Cycle Worksheet
3. What molecule do trees get their carbon from? CO2
4. Where do primary consumers get their carbon from? EATING PLANTS
5. What process adds carbon to the atmosphere? CELLULAR RESPIRATION
6. What process removes carbon from the atmosphere? PHOTOSYNTHESIS
7. How does oxygen get into the water? PHOTOSYNTHESIS MOVEMENT
OF WATER
8. What do producers produce? GLUCOSE (CARBOHYDRATES)
9. List 3 groups of producers? PLANTS
ALGAE
SOME BACTERIA
10. What group eats producers? PRIMARY CONSUMERS
11. How does carbon get back into the atmosphere from the food we eat?
CELLULAR RESPRATION
12. Where do secondary consumers get their carbon from? PRIMARY
CONSUMERS
13. Where does an animal’s or plant’s carbon go when it dies? GROUND
14. Why should the amount of carbon in the atmosphere stay the same?
PHOTSYNTHESIS AND RESPIRATION SHOULD BALANCE EACH OTHER
OUT.
15. How is extra carbon getting into the atmosphere today? BURNING FOSSIL
FUELS
16. List 3 ways that we could reduce the extra carbon that is getting into the
atmosphere.
1. PLANT TREES
2. USE LESS FOSSIL FUELS
3. REMOVE CO2 FROM EMISSIONS 4. CONSERVE ELECTRICITY
5. ELECTRIC CARS
In the space below, draw your own version
of the carbon cycle. Use arrows to show
which way the carbon is going.
Label:
Producers
Primary Consumers
Secondary Consumers
1. Why do plants and animals and animals need nitrogen (N)?
TO BUILD PROTEIN MOLECULES
2. What molecule in the atmosphere is nitrogen normally found in?
Name _________________________
N2
3. What molecule in the ground is nitrogen found when there is no oxygen around?
NH3
4. What molecule in the ground is nitrogen found when there is oxygen around? NO3
5. What organic molecule is nitrogen found in? AMINO ACIDS, PROTEINS
6. What are 2 ways that atmospheric nitrogen gets into the ground? NITROGENFIXING BACTERIA LIGHTNING
7. What organisms (living things) do the nitrogen fixation for plants? BACTERIA
8. Why don’t farmers have to put nitrogen fertilizer on soybeans? SOYBEANS ARE
LEGUMES; HAVE NITROGEN-FIXING BACTERIA
9. Where do plants get their nitrogen from? THE GROUND (NO3)
10. How do primary consumers get their nitrogen from? EATING PLANT PROTEIN
11. How do secondary consumers get their nitrogen from? EATING ANIMAL
PROTEIN
12. What’s another term for a primary consumer? HERBIVORE
13. What’s another term for a secondary consumer? CARNIVORE
14. Where does an animal’s or plant’s nitrogen go when it dies? GROUND AFTER
BACTERIA DECOMPOSE THE ORGANISM
15. Who breaks the dead organisms’ body back into inorganic nitrogen? BACTERIA
16. How is extra nitrogen getting into the Bay ecosystem? BURNING FOSSIL FUELS
FERTILIZER
SEWAGE (ANIMAL OR HUMAN WASTE) DECAY
17. Why is extra Nitrogen (N) in the Chesapeake Bay a problem? 1. EXTRA N
CAUSES ALGAE BLOOMS. 2. ALGAE BLOCKS SUNLIGHT FOR SAV
PHOTOSYYNTHESIS 3. WHEN ALGAE DIE, BACTERIA USE UP OXYGEN
BREAKING IT DOWN (EUTROPHICATION)
Nitrogen Cycle Worksheet
N
In the space below, draw your own version
of the nitrogen cycle. Use arrows to show
which way the carbon is going.
Label:
Producers (Plants)
Nitrogen Fixing Bacteria
Primary Consumers
Secondary Consumers
Decomposers