Phosphorus Cycle/Fertilizers

Phosphorus is needed to form

• teeth

• bones

• skin

• hair

The phosphorus cycle has a step that takes place in the atmosphere

• true

• false

Phosphorus can normally exist as a gas

• true

• false

Phosphorus enters the cycle after _________

• rocks weather and rock sediment goes into the ground

• photosynthesis by plants

• ammonification by bacteria

• fossil fuels are burned

Plants take up ________ in their roots

• phosphites

• phosphines

• carbons

• phosphates

When animals and plants decompose their phosphates ______ into the soil and ground water

• beach

• teach

• move

• leach

Phosphate sediments float when they arrive to water from the land as runoff

• true

• false

_________ rock formations are formed after phosphorus is weathered off rocks, sinks to the bottom of water and collects

• phosphite

• phosphate

_______ is the driving factor behind the phosphorus

• erosion

• photosynthesis

• nitrogen fixation

• respiration

Phosphate is able to enter bodies of water after traveling through groundwater

• true

• false