Carbon Cycle 1
What type of gas do plants take in from the air to do photosynthesis?
a. carbohydrates
b. carbon dioxide
c. carbon gas
d. ammonia
b. carbon dioxide
Organic molecules, and all living organisms, are made of what element?
A. Carbon
B. Nitrogen
C. Water
D. Oxygen
A. Carbon
Where is most of the nitrogen found in?
Atmosphere
Where is phosphorus not found?
atmosphere
Looking for a term:
This term states that matter cannot be created or destroyed, only changed in form, meaning the total mass of reactants must equal the total mass of products in a chemical reaction.
The Law of Conservation of Mass
Which of the following does not add carbon dioxide to the atmosphere?
a. cutting down trees
b. driving a car
c. burning fossil fuels
d. All of the above add carbon dioxide to the atmosphere
d. All of the above add carbon dioxide to the atmosphere
Animals get carbon from the plants through a/the ______ _______.
Food chain
Who solves the problem of making nitrogen and phosphorus biologically usable for living organisms?
bacteria
Most of Earth's phosphorus is stored where? (be specific)
The lithosphere or earth's crust
What do the arrows represent in a food chain or food web?
Energy flow - The arrows represent where energy goes to next.
Which process does not release carbon into the air?
a. burning fossil fuels
b. cellular respiration
c. photosynthesis
d. decomposition
c. photosynthesis
How have humans increased the amount of carbon in the atmosphere?
a. by burning oil
b. by using coal
c. by cutting down trees
d. all of the above
d. all of the above
What is the abiotic thing (hint: weather) that can help fix Nitrogen into a form plants can use?
Lightning
What are the main ingredients in fertilizers?
phosphorus and nitrogen
Hawks eat snakes, snakes eat mice, and mice eat plants. What trophic level are the hawks in?
Tertiary consumer or apex predator
Which part of the carbon cycle occurs when plants or animals die?
decomposition
Which part of the carbon cycle involves organisms breaking down food for energy and letting out carbon dioxide?
cellular respiration
The process of decomposers turning nitrates or nitrites into nitrogen gas which is then released into the atmosphere is called _________.
A. nutrification
B. denitrification
C. assimilation
B. denitrification
What role do decomposers play in the phosphorous cycle?
A. absorb phosphorous
Which of the following is NOT a source of carbon for the carbon cycle?
A. shells of marine organisms
B. oil
C. decomposers
D. fertilizer
E. the atmosphere
D. fertilizer
THINK! How does deforestation increase the amount of carbon in the air?
By cutting down trees, the carbon dioxide stays in the air
Describe one way humans can prevent excess carbon from being released into the atmosphere.
1) Plant more trees. We cannot simply stop cutting trees because we need them for products.
2) Reduce the amount of energy we use so we are not dependent on fossil fuels
3) Use other sources of energy like wind, water, or solar, instead of using fossil fuels
These organisms must obtain nitrogen from the food they eat.
A. Consumers
B. Producers
C. Plants
D. Bacteria
A. Consumers
Which of the following processes plays an important role in the phosphorus cycle?
A. weathering & erosion
How many neutrons does the element Hydrogen have?
0