Question 1

How do plants fit into the carbon cycle?

Accepted Answer

They absorb carbon dioxide then convert it into sugars and other organic molecules

Question 2

How do animals fit into the carbon cycle?

Accepted Answer

They eat sugars and organic molecules, then breath out carbon dioxide

Question 3

What gas do plants produce that animals need to survive?

Accepted Answer

They produce oxygen which animals need

Question 4

How would cutting down trees affect the carbon cycle?

Accepted Answer

Fewer trees would cause carbon dioxide to build up in the atmosphere

Question 5

How could pollution in the ocean affect the carbon cycle?

Accepted Answer

Most photosynthesis happens in the ocean through photosynthetic algae. Killing these algae could reduce the oxygen available to animals

Question 6

How could adding CO2 to the atmosphere affect the carbon cycle?

Accepted Answer

This could increase the amount of plants and algae which absorb carbon dioxide

Question 7

What organisms prevent carbon from being trapped inside of dead things?

Accepted Answer

Decomposers recycle the carbon found in dead organisms

Question 8

What process causes nitrogen gas (N2) to be converted into ammonia (NH3) in the air?

Accepted Answer

Lightening causes nitrogen to react with hydrogen in the air turning it into ammonia

Question 9

What lives in the soil and plant roots and convert nitrogen gas into ammonia?

Accepted Answer

Nitrogen-fixing bacteria convert N2 into NH3

Question 10

What do we call bacteria that convert ammonia into nitrates/nitrites?

Accepted Answer

Nitrifying bacteria convert NH3 into NO2-/NO3-

Question 11

What type of plants has nitrogen-fixing bacteria in their roots?

Accepted Answer

Legumes have root nodules containing nitrogen-fixing bacteria(Clover, beans, peas, alfalfa, soy and peanuts are all types of legumes)

Question 12

What organisms prevent nitrogen from being trapped inside of dead things?

Accepted Answer

Decomposers recycle the nitrogen found in dead organisms and convert it into ammonia

Question 13

How does growing crops in a field affect the nitrogen levels of the soil?

Accepted Answer

They deplete the nitrogen in the soil and can cause future plants to not grow as well

Question 14

How can farmers replenish the nitrogen in the soil?

Accepted Answer

They can rotate crops so that legumes grow in each field every few years(Clover, beans, peas, alfalfa, soy and peanuts are all types of legumes)

Question 15

What can happen if excess fertilizers leak into rivers, lakes and streams?

Accepted Answer

Too much algae can grow in the water which takes the oxygen away from fish

Question 16

What is the NPK rating on a fertilizer?

Accepted Answer

This shows the amount of nitrogen (N), phosphorous (P) and potassium (K) in the fertilizer

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