The Cycles of Matter

Question 1

Biogeochemical cycles are

Answer 1

nutrient cycles or pathways

Question 2

Nutrient cycles

Answer 2

chemical elements and molecules
move through biotic and abiotic regions
method for matter to cycle on Earth
essential for the Earth system to function
essential for life on Earth to exist

Question 3

Water cycle processes

Answer 3

precipitation
evaporation
condensation
evapotranspiration
sublimation
surface run-off
infiltration

Question 4

What is the percentage of precipitation that falls back to Earth

Answer 4

22%

Question 5

The Nitrogen cycle

Answer 5

amino acids and proteins
DNA and RNA
chlorophyll and photosynthesis

Question 6

Nitrogen is essential for……

Answer 6

life processes

Question 7

Nitrogen fixation

Answer 7

converts gaseous nitrogen to usable form

Question 8

Which organism performs nitrogen fixation

Answer 8

nitrogen-fixing bacteria

Question 9

Phosphorus is found in…

Answer 9

bones (calcium phosphate)
cell membranes (phospholipids)
component of nucleotides
ATP, DNA, RNA

Question 10

The phosphorus cycle

Answer 10

phosphorus does not enter atmosphere
remains mostly on land (rock and soil)
slow cycle, especially though soil and ocean

Question 11

Phosphorus is essential for life: T or F

Answer 11

True

Question 12

Oxygen cycle

Answer 12

main source of atmospheric oxygen

Question 13

Photolysis

Answer 13

UV radiation breaks down water and nitrites

provides additional atmospheric oxygen

Question 14

Respiration and decay

Answer 14

animals and bacteria consume oxygen

Question 15

Carbon in the atmosphere

Answer 15

mainly Co2 - supports life

Question 16

What does the CO2 in the atmosphere cause

Answer 16

greenhouse gasses- global warming

Question 17

What is carbon emitted by

Answer 17

respiration, decay, and combustion

Question 18

What is the driving force of the oxygen cycle

Answer 18

photosynthesis

Question 19

What does photosynthesis produce

Answer 19

sugar and oxygen

Question 20

Carbon in the biosphere

Answer 20

producers use for photosynthesis

transferred to consumers though feeding

Question 21

Carbon in the ocean

Answer 21

important for PH levels

Question 22

What is the ultimate source of energy

Answer 22

the sun

Question 23

Where does energy changes occur

Answer 23

in nutrient cycles

Question 24

Total amount of energy entering Earth should balance the amount……

Answer 24

radiating into space

Question 25

The Greenhouse Effect

Answer 25

energy recycling in the atmosphere to warm the Earth’s surface
presently Earth absorbs more energy than it emits