Nitrogen returns to the atmosphere through a process called(1 point)

denitrification.

Nitrogen from animal waste can be stored in bodies of water as(1 point)

Responses

ammonia.
ammonia.

nitrates.
nitrates.

nitrogen gas.
nitrogen gas.

nitrites.

nitrates.

Living organisms can incorporate ________ into their metabolism.(1 point)

Responses

nitrites
nitrites

nitrogen gas
nitrogen gas

nitrates
nitrates

ammonia

ammonia

Usable forms of nitrogen can intentionally be increased in the soil by(1 point)

Responses

lightning.
lightning.

planting fewer beans.
planting fewer beans.

planting more trees.
planting more trees.

allowing organic matter to decompose.

allowing organic matter to decompose.

Identify the first step in solving this equation for x : 7(x − 8) = 49 . (1 point)

Responses

Divide only the left side by 7.
Divide only the left side by 7.

Multiply both sides by 7.
Multiply both sides by 7.

Add 8 to both sides.
Add 8 to both sides.

Divide both sides by 7.

Divide both sides by 7.

Identify the second step in solving this equation for y : −3(y + 6) = 21 . (1 point)

Responses

Divide both sides by 6.
Divide both sides by 6.

Divide both sides by −3
.
Divide both sides by negative 3.

Subtract 6 from both sides.
Subtract 6 from both sides.

Add 6 to both sides.

Divide both sides by -3.