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Biogeochemical Cycles

Total questions: 80

Worksheet time: 5hrs 13mins

Name
Class
Date
1.
Which is NOT a process of the water cycle?
a)
precipitation
b)
freezing
c)
transpiration
d)
evaporation
2.
The process of plants losing water through their leaves is called ____.
a)
condensation
b)
evaporation
c)
transpiration
d)
exhaling
3.

Why do living things need nitrogen?

a)

To get energy

b)

To make amino acids

c)

To make proteins

d)

To make proteins AND amino acids

4.
What is the only process that removes carbon from the atmosphere?
a)
combustion
b)
cellular respiration
c)
photosynthesis
d)
decomposition
5.
Where is carbon stored in the environment?
a)
Fossil fuels
b)
Wood of trees
c)
Calcium carbonate (shells and bones)
d)
All of the above
6.
What converts nitrogen into a useable form for plants and animals?
a)
bacteria
b)
fungi
c)
rain
7.
Which nutrient is not cycled through the atmosphere?
a)
carbon
b)
nitrogen
c)
phosphorous
d)
water
8.
This is released by the weathering of rocks.
a)
Carbon
b)
Oxygen
c)
Phosphorus
d)
Nitrogen
9.

What cycle are fossil fuels part of ?

a)

carbon

b)

oxygen

c)

nitrogen

d)

phosphorus

10.

Where is the largest reservoir for the phosphorus cycle?

a)

rocks and minerals

b)

the ocean

c)

the atmopshere

d)

fossil fuels

11.

What is the largest reservoir for nitrogen?

a)

the ocean

b)

rocks and minerals

c)

the atmosphere

d)

bacteria

12.

What is the largest reservoir for water?

a)

the ocean

b)

rocks and minerals

c)

the atmosphere

d)

glaciers

13.

A particular golf course is using large amounts of nitrogen fertilizer. What process could move this nitrogen into a local stream?

a)

volatilization

b)

nitrogen fixation

c)

runoff and leaching

d)

ammonification

14.

The carbon in coal, oil, and natural gas came from

a)

the combustion of fossil fuels

b)

the remains of dead organisms

c)

carbon-fixing bacteria in swamp soil

d)

carbon dioxide dissolved in ocean water

15.

Plant roots directly obtain water from

a)

Water vapor

b)

Groundwater stored below the soil

c)

Precipitation

d)

Water runoff from rivers and streams

16.

According to the diagram, geologic activity, such as volcanoes,

a)

Increases the levels of CO2 in the atmosphere.

b)

Decreases the levels of CO2 in the atmosphere.

17.

Phosphorus is released from rock through ________

a)

decomposition

b)

evaporation

c)

weathering

d)

transpiration

18.

Which is NOT a process of the water cycle?

a)
precipitation
b)
freezing
c)
transpiration
d)
evaporation
19.
What is the only process that removes carbon from the atmosphere?
a)
combustion
b)
cellular respiration
c)
photosynthesis
d)
decomposition
20.
Where is carbon stored in the environment?
a)
Fossil fuels
b)
Wood of trees
c)
Calcium carbonate (shells and bones)
d)
All of the above
21.
What converts nitrogen into a useable form for plants and animals?
a)
bacteria
b)
fungi
c)
rain
22.
Which nutrient is not cycled through the atmosphere?
a)
carbon
b)
nitrogen
c)
phosphorous
d)
water
23.
oxygen is a gas produced by _ and used by  _ 
a)
plants and animals 
b)
photosynthesis and carbon dioxide 
c)
animals and plants 
d)
carbon dioxide and photosynthesis
24.
if there is a fire in a forest, there will be less _ in the environment?
a)
nitrogen
b)
oxygen
25.
All of the carbon in existence is continually recycled in the carbon cycle
a)
True
b)
False
26.
How is the burning of fossil fuels related to global warming?
a)
Magic
b)
Fuels are hot
c)
Greenhouse effect
d)
Photosynthesis
27.
Which of the following removes carbon from the atmosphere?
a)
Combustion
b)
Respiration
c)
Photosynthesis
d)
Death
28.
Which of the following is an example of a decomposer?
a)
Owl
b)
Fish
c)
Tree
d)
Mushroom
29.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
30.
Which process converts carbon in the form of sugar into carbon dioxide gas?
a)
Bioremediation
b)
Photosynthesis
c)
Respiration
d)
Transpiration
31.

If the plant population decreased, the amount of carbon in the atmosphere would _________.

a)

Stay the same

b)

Increase

c)

Decrease

32.

oxygen is a gas produced by _____ and used by ________

a)

plants and animals

b)

photosynthesis and carbon dioxide

c)

animals and plants

d)

carbon dioxide and photosynthesis

33.
carbon dioxide is a gas produced  by ________ and used by __________
a)
plants and animals 
b)
carbon and photosynthesis
c)
animals and plants 
d)
photosynthesis
34.

Which describes the relationship between plants and animals in the carbon cycle?

a)

Plants produce and release oxygen that animals need

b)

Plants produce and release carbon dioxide that animals need

c)

Animals produce and release oxygen that plants need

d)

Animals produce oxygen that plants turn into carbon dioxide

35.

Which is a true statement?

a)

Humans depend on oxygen, plants depend on carbon dioxide

b)

Plants produce carbon dioxide

c)

Humans depend on carbon dioxide, plants depend on oxygen

d)

Humans don't depend on plants for the air they need

36.

Plants use ____________ to make their own food

a)

Water

b)

Sunlight

c)

Carbon dioxide

d)

All of these

37.

Which gas do plants release, that humans depend on for survival?

a)

Water

b)

Carbon Dioxide

c)

Oxygen

d)

Sugar

38.

C6H12O6 is also known as glucose (sugar). Where is it found?

a)

Plants

b)

Animals

c)

Both plants and animals

d)

Neither plants or animals

39.

Which is an example of a carbon sink?

a)
b)
c)
d)
40.

Carbon atoms cannot be created or destroyed

a)

True

b)

False

c)

Not enough information to answer

41.
What does NOT produce carbon dioxide?
a)
Photosynthesis
b)
Burning Fossil Fuels
c)
Animal respiration
d)
Plants decaying
42.
Combustion is another word for __________.
a)
Transportation
b)
Respiration
c)
Fossil Fuels
d)
Burning
43.

Which nitrogen cycle process is occurring when bacteria convert ammonium to nitrite and then into nitrate?

a)

nitrogen fixation

b)

nitrification

c)

denitrification

d)

ammonification

e)

assimilation

44.

Which of these nitrogen cycle processes converts atmospheric nitrogen to a soil form of nitrogen that is usable by plants?

a)

nitrogen fixation

b)

nitrification

c)

denitrification

d)

ammonification

e)

assimilation

45.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
46.
Organisms that break down dead plants & animals and release nitrogen back into atmosphere...
a)
bacteria
b)
plants
c)
animals
d)
producers
47.
Organisms that need nitrogen to survive
a)
only plants
b)
only animals
c)
only bacteria
d)
all living organisms
48.
If the atmosphere is 78% N2, why can't we just get our nitrogen by breathing?
a)
We have no mechanism to break the triple bond of nitrogen between the atoms.
b)
Our lungs would be damaged by the N2.
c)
We need Oxygen for cellular respiration.
d)
The legumes take it up first.
49.
Plants and animals cannot use nitrogen directly from the air.
a)
True
b)
False
50.
After plants and animals contain nitrogen, what puts it back into atmosphere and soil?
a)
decomposition
b)
precipitation
c)
condensation
d)
bacteria
51.
Nitrification happens in the ______
a)
Air 
b)
Soil 
c)
Ground Water 
d)
Plants 
52.

What is true about nutrients in the ecosystem (such as water, carbon, and nitrogen)?

a)

They are not affected by humans in the ecosystem.

b)

They cannot be recovered if they are lost in the ecosystem.

c)

They cycle through the ecosystem in different forms to support life.

d)

They are usually only found in one form in the ecosystem to support life.

53.

What is the original, and primary reservoir of inorganic phosphate (PO43-)in terrestrial ecosystems?

a)

live plants and animals

b)

groundwater

c)

the atmosphere

d)

rocks

54.

Plants are the only organisms that can directly absorb inorganic phosphorus ions (PO43-) and turn them into organic molecules that can support all other life processes in an ecosystem.

a)

true

b)

false

55.

Inorganic phosphate (PO43-) is added to the soil by which three processes?

a)

uplift; sedimentation; consumption

b)

live plants; animal decomposition; bacterial fixation

c)

precipitation; runoff; weathering of rock

d)

animal excretion; decomposition; weathering of rock

56.

Why is phosphorus important to biology?

a)

it works alongside the nitrogen cycle to fertilize plants

b)

it is the primary component of mountains, which serve as habitats for animals

c)

it enhances decomposition of organic matter

d)

it is a component of many biological molecules, such as nucleic acids, some lipids, ATP, and bony structures

57.

Nitrogen and carbon are cycled on a global scale. Why does phosphorus cycling tend to occur more locally?

a)

it primarily involves the weather of rocks, which are mostly stationary

b)

it only involves land animals that cannot swim across oceans to transport the nutrient

c)

it occurs in areas where cloud formation is low, so it rarely gets trapped in water vapors

d)

all of the answers are correct

58.

The phosphorus cycle occurs much more quickly than the carbon and nitrogen cycles.

a)

true

b)

false

59.
When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.
a)
Water
b)
Atmosphere
c)
Sun
d)
Air
60.
What is happening at 1?
a)
respiration: releasing CO2
b)
decomposing CO2 in the soil
c)
photosynthesis: absorbing CO2
d)
turning CO2 from the atmosphere into organic molecules
61.

What is the energy source for the water cycle?

a)

sun

b)

wind

c)

rain

d)

oceans

62.

On Earth, what process generates most of the water vapor?

a)

Condensation

b)

Evaporation

c)

Precipitation

d)

Transpiration

63.
What is A?
a)
Evaporation
b)
Condensation
c)
Precipitation
d)
Runoff
64.
What is B?
a)
Evaporation
b)
Condensation
c)
Precipitation
d)
Runoff
65.
What is      D?
a)
Evaporation
b)
Condensation
c)
Precipitation
d)
Runoff
66.

What are formed when water vapor condenses?

a)

Clouds

b)

Mountains

c)

Transpiration

d)

Valleys

67.
Evaporation happens when the sun ___________ water and turns it into vapor.
a)
cools
b)
heats up
c)
freezes
d)
lights up
68.
Which is the opposite of condensation?
a)
runoff
b)
evaporation
c)
precipitation
d)
transpiration
69.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
70.

The image shows various stages in the water cycle. During which stage does water flow back towards the sea as runoff?

a)

W

b)

X

c)

Y

d)

Z

71.

Water in its gas form is called ____________________,

a)

water vapor

b)

precipitation

c)

ice

d)

air

72.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
73.

Rain and snow are two different forms of precipitation that fall on Earth's surface. Which factor is responsible for there being different forms of precipitation?

a)

Evaporation

b)

Run-off

c)

Temperature

d)

Transpiration

74.

Precipitation means...

a)

water vapor cooling to form clouds

b)

water running downhill

c)

water falling from the sky

d)

water heating up and rising as gas

75.

Runoff means...

a)

water vapor cooling to form clouds

b)

water running downhill

c)

water falling from the sky

d)

water heating up and rising as gas

76.

Condensation means...

a)

water vapor cooling to form clouds

b)

water running downhill

c)

water falling from the sky

d)

water heating up and rising as gas

77.

Evaporation means...

a)

water vapor cooling to form clouds

b)

water running downhill

c)

water falling from the sky

d)

water heating up and rising as gas

78.
What follows evaporation during the water cycle? How does this occur?
a)
Water evaporates into water vapor
b)
Water vapor condenses and forms a  cloud
c)
Water precipitates to the ground
d)
Water runs down into the hydrosphere
79.
Snow, sleet, hail, and rain are all examples of  ________________. 
a)
evaporation
b)
condensation
c)
accumulation
d)
precipitation
80.

As a part of the water cycle, water from Earth's surface enters the clouds and finally falls back to the ground in the form of rain. What is the correct sequence of processes water undergoes?

a)

Evaporation, Condensation, Precipitation

b)

Precipitation, Condensation, Evaporation

c)

Condensation, Evaporation, Precipitation

d)

Evaporation, Precipitation, Condensation

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