Natural Cycles

Front 1

Process by which water vapor changes into liquid water

Back 1

condensation

Front 2

Process by which certain bacteria break down nitrogen compounds and release nitrogen

Back 2

denitrification

Front 3

Process by which liquid water changes into water vapor

Back 3

evaporation

Front 4

Process by which certain bacteria convert nitrogen in the soil into nitrogen compounds

Back 4

fixation

Front 5

Remains or evidence of an organism that once lived, preserved in rock

Back 5

fossils

Front 6

Moisture falling from the clouds as snow, rain, or hail

Back 6

precipitation

Front 7

The process by which plants give off water vapor

Back 7

transpiration

Front 8

a liquid changing to a gas

Back 8

evaporation

Front 9

evaporation from plants

Back 9

transpiration

Front 10

a gas changing to a liquid

Back 10

condensation

Front 11

moisture collecting on cool surfaces

Back 11

dew

Front 12

moisture falling to the Earth

Back 12

precipitation

Front 13

In order to evaporate, water needs _____.

Back 13

solar radiation
energy
heat

Front 14

Rain drops are formed by water vapor condensing on _____.

Back 14

dust

Front 15

the ratio of the total amount of precipitation compared with the total amount of evaporation for the entire Earth is:

Back 15

equal

Front 16

most of the precipitation reaching the Earth _____.

Back 16

evaporates

Front 17

As warm air containing water vapor rises, it continues to warm.

Back 17

false

Front 18

Rain falls when the suspended water droplets become too heavy

Back 18

true

Front 19

What sources release water vapor by evaporation?

Back 19

oceans
plants
soil
animals
streams

Front 20

Numerous microscopic water droplets which have condensed on dust and float in the air form what?

Back 20

clouds

Front 21

Air which will hold more water vapor is _____.

Back 21

warm air

Front 22

The falling of rain, snow, hail, or ice pellets from the atmosphere is called _____________.

Back 22

precipitation

Front 23

How does precipitation eventually return to the oceans?

Back 23

surface run-off
direct precipitation
ground water
icebergs

Front 24

The water cycle was described in the Scriptures long before modern scientists understood it.

Back 24

true

Front 25

Carbon is restored to the atmosphere when animals decompose.

Back 25

true

Front 26

The atmosphere stores much more carbon dioxide than the oceans.

Back 26

false

Front 27

Carbon dioxide dissolves easily in water.

Back 27

true

Front 28

Coal, oil, and natural gas are formed from organic (plant and animal) remains as a result of rapid burial

Back 28

true

Front 29

The Carbon-Oxygen cycle is regulated by three great reservoirs _____.

Back 29

organisms
oceans
rocks

Front 30

The burning of fossil fuels will release _____ into the carbon-oxygen cycle.

Back 30

carbon

Front 31

Respiration releases:

Back 31

carbon dioxide

Front 32

All animals and people receive carbon from food

Back 32

true

Front 33

The carbon-oxygen cycle has proven to be very efficient at maintaining the exact quantity of oxygen in the atmosphere that we need for survival.

Back 33

true

Front 34

Animals are necessary to complete the nitrogen cycle.

Back 34

false

Front 35

Plants are capable of using nitrogen directly from the atmosphere.

Back 35

false

Front 36

Only plants are capable of making protein directly from nitrates.

Back 36

true

Front 37

Denitrification is unfavorable to farming.

Back 37

true

Front 38

Nitrogen fixation is a process that changes nitrogen into nitrogen compounds.

Back 38

true

Front 39

The two groups of bacteria responsible for nitrogen fixation are found in soil and in the roots of legumes

Back 39

true

Front 40

plants use nitrates to form proteins

Back 40

true

Front 41

Nitrogen released from decaying organisms is in the form of ammonia

Back 41

true

Front 42

A farmer may plow back legumes into the soil because they collect excess nitrates

Back 42

true

Front 43

The process by which bacteria produces nitrogen compounds is called what?

Back 43

nitrogen fixation

Front 44

Animals and humans do not need the nitrogen cycle to maintain life.

Back 44

false

Front 45

Plants need certain bacteria to produce usable nitrogen compounds because:

Back 45

plants cannot separate the nitrogen gas molecule into a usable element

Front 46

The chemical weathering of rocks at the Earth's surface releases phosphorus into the biosphere.

Back 46

true

Front 47

what statements are true about all the natural chemical cycles?

Back 47

Each cycle affects other cycles
Human activity has upset cycles in local areas
All the natural cycles work together to support life

Front 48

Water plants and algae can experience excessive growth if large quantities of phosphorus is carried into bodies of water by run-off.

Back 48

true