Unit 1: Cycles

Question 1

Why is phosphorus necessary for a unicellular or multicellular organism?

Answer 1

for the synthesis of DNA and RNA

Question 2

Stage of the water cycle that follows precipitation after days of raining (ground is already saturated)

Answer 2

runoff

Question 3

During the nitrogen cycle what process fixes atmospheric nitrogen into the ground?

Answer 3

atmospheric fixation

Question 4

Stage of the water cycle where water changes from a liquid to a gas

Answer 4

evaporation or transpiration

Question 5

Another name for the water cycle

Answer 5

hydrologic cycle

Question 6

What bacteria are called that change ammonia, nitrates, and nitrites back into atmospheric nitrogen?

Answer 6

Denitrifying bacteria

Question 7

What is it called when ammonia is formed during the nitrogen cycle?

Answer 7

nitrogen fixation

Question 8

What aids atmospheric fixation

Answer 8

lightning

Question 9

Stage of the water cycle following infiltration or seepage

Answer 9

root uptake

Question 10

What leads to condensation of water in the atmosphere?

Answer 10

Cooling of the atmosphere

Question 11

Stage of the water cycle where water turns from a gas to a liquid

Answer 11

condensation

Question 12

What results from the condensing of water in the atmosphere?

Answer 12

Cloud formation

Question 13

Evaporation from plants

Answer 13

transpiration

Question 14

During the nitrogen cycle what are the bacteria called that change waste into ammonia?

Answer 14

decomposing bacteria

Question 15

Why is carbon necessary for a unicellular or multicellular organism?

Answer 15

to make organic molecules

(carbon backbone)

Question 16

What drives the hydrologic cycle?

Answer 16

the sun