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Bio Cycles

Total questions: 114

Worksheet time: 2hrs 38mins

Name
Class
Date
1.

What is the energy source for the water cycle?

a)

the Sun

b)

the Earth

c)

water

d)

the Moon

2.
During which stage do clouds form?
a)
condensation
b)
evaporation
c)
precipitation
3.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
4.

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

5.

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

6.
Snow, sleet, hail, and rain are all examples of  ________________. 
a)
evaporation
b)
condensation
c)
accumulation
d)
precipitation
7.
Animals and plants use substances that cycle through the environment.  Which substance is needed by plants to survive and is released into the environment by animals?
a)
oxygen
b)
sugar
c)
salt
d)
carbon dioxide
8.

The carbon dioxide/oxygen cycle is important to animals because it provides

a)

oxygen they take in when breathing

b)
chemicals that build bones
c)

carbon dioxide that animals need for respiration

d)
fresh water for their survival
9.
Plants use _____________ to make their own food during photosynthesis.
a)
water
b)
energy from the Sun
c)
CO2
d)
water, energy from Sun, CO2
10.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
11.

All of the carbon that exists on Earth is continually recycled in the carbon cycle

a)

True

b)

False

12.
In what process is Carbon transformed into chemical energy?
a)
Photosynthesis
b)
Respiration
c)
Primary Production
d)
Secondary Production
13.
The diagram shows the flow of organic molecules through an ecosystem. What two processes are identified by the labels X and Y?
a)
X : Respiration
Y : Predation
b)
X : Adaptation
Y : Decomposition
c)
X : Fermentation
Y : Nitrogen Fixation
d)
X : Decomposition
Y : Respiration
14.

How do animals get carbon?

a)

By eating plants and or other animals.

b)

They absorb it from the atmosphere.

c)

From the ground

d)

They do not get carbon from anywhere.

15.

Which of the following are fossil fuels?

a)

Coal, water, oil

b)

Oxygen, coal, oil

c)

Coal, Oil, Natural Gas

d)

None of the above

16.
How does the carbon in grass become part of a lion?
a)
The lion eats the grass
b)
Carbon from grass doesn't end up in a lion. 
c)
The carbon ends up in the lion's food chain. 
d)
The lion breathes in carbon given out by the plant
17.
Burning fossil fuel has which effect in the carbon cycle?
a)
It removes carbon dioxide from the atmosphere.
b)
It puts carbon dioxide under the ground.
c)
It adds carbon dioxide to the atmosphere.
d)
It has no effect in the carbon cycle.
18.
Which of the following add carbon dioxide to the atmosphere?
a)
volcanoes
b)
combustion of fossil fuels
c)
animal and plant respiration
d)
all of these
19.

What is happening at 2?

a)

respiration: releasing CO2

b)

decomposing CO2 in the soil

c)

photosynthesis: absorbing CO2

d)

turning CO2 from the atmosphere into organic molecules

20.
Which statement is true about the carbon dioxide-oxygen cycle?
a)
animals breathe in nitrogen and release oxygen which is used by plants
b)
animals breathe in oxygen and release carbon dioxide which is used by plants
c)
animals breathe in nitrogen and release carbon dioxide which is used by plants
d)
animals breathe in carbon dioxide and release oxygen which is used by plants
21.
If all the trees on Earth were destroyed, what would be the effect on humans?
a)
there would be a lack of food
b)
there would be a lack of oxygen
c)
there would be a lack of fresh water
d)
there would be a lack of carbon dioxide
22.
The class decided to have a terrarium.  The teacher says it is important to include both plants and animals.  Why is it necessary to include both plants and animals?
a)
plants provide food for the animals and animals provide water for the plants
b)
plants provide water for the animals and animals provide food for the plants
c)
plants provide carbon dioxide for the animals and animals provide oxygen for the plants
d)
plants provide oxygen for animals and the animals provide carbon dioxide for the plants
23.

________________ could increase the amount of oxygen in the air.

a)

Building more houses

b)

Burning more oil

c)

Paving more streets

d)

Planting more trees

24.
How plants and animals interact in the CO2/O cycle?
a)
Plants release O into the atmosphere which animals inhale. Animals exhale CO2 into the atmosphere which is breath in by plants.
b)
Animals release O into the atmosphere which plants inhale. Plants exhale CO2 into the atmosphere which is breath in by animals.
c)
Plants and animals don't need each other.
d)
Plants and animals take in O and release CO2.
25.
If the Sun stop shinning, plants and animals would not survive because ___________________.
a)
Plants use the Sun's energy and oxygen to make glucose, which animals eat.
b)
Plants use the Sun's energy and CO2 to make glucose, and release O that animals breathe.
c)
Plants use the Sun's energy to make CO2 and release glucose.
d)
Plant use the Sun's energy to make water and release O that animals breathe in.
26.
Which answer best defines organisms?
a)
a gas in the atmosphere that plants use during the process of photosynthesis
b)
living things
c)
tiny holes in the leaves of a plant that allow gases to enter or leave a plant
d)
plant parts that hold a plant in place and take in water and nutrients
27.

Humans contribute to the amount of released carbon dioxide through all of the following except -

a)

the expansion of urban centers.

b)

burning of fossil fuels.

c)

dstroying forests for use as agricultural land.

d)

using wind energy.

28.

Select all answers below that correctly describe the movement of carbon dioxide in the carbon cycle.

a)

During photosynthesis, plants use carbon dioxide to make glucose and store it as starch.

b)

The decomposition of plants and animals releases carbon dioxide into the atmosphere.

c)

Oceans release carbon dioxide into the atmosphere at an extremely slow rate.

d)

Animals consume carbon stores in plants and then release carbon dioxide during cellular respiration.

29.

What is the correct equation for photosynthesis?

a)

6CO2 + 6H2O + Sunlight --> C6H12O6 + 6O2

b)

None of these is correct.

c)

6CO2 + 6O2 + sunlight --> C6H12O6 + 6O2 + Energy

d)

C6H12O6 + 6O2 --> 6CO2 + 6H2O + Sunlight

30.

Carbon is an element with an atomic number of 6 that is found in all living things and in the atmosphere as carbon (a)   .

31.

The circulation of carbon between the living and nonliving parts of an environment is called -

a)

the carbon cycle.

b)

weathering.

c)

global warming.

d)

recycling.

32.

A(n) _________________ is a substance that is discharged from a source.

a)

decomposition

b)

combustion

c)

fuels

d)

emission

33.

Carbon is released to the environment through all of the following except -

a)

combustion.

b)

photosynthesis.

c)

volcanic activity.

d)

decomposition.

34.

The largest reservoir of carbon is in the -

a)

ocean.

b)

coal deposits.

c)

atmosphere.

d)

bodies of living things.

35.

Carbon dioxide is a waste product of -

a)

photosynthesis.

b)

cellular respiration.

c)

osmosis.

d)

DNA replication.

36.

Decomposers break down dead and decaying (a)   matter.

37.

Which process converts atmospheric nitrogen into a form usable by plants?

a)

DENITRIFICATION

b)

NITROGEN FIXING BACTERIA

c)

NITRIFICATION

d)

AMMONIFICATION

38.

Pick 2 ways that nitrogen in the atmosphere enters the soil.

a)

sunlight

b)

wind

c)

snow

d)

rain

39.

What process of the nitrogen cycle occurs in the roots of plants?

a)

Denitrification

b)

Nitrogen fixation

c)

Photosynthesis

d)

Cellular Respiration

40.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
41.

The process that allows organisms to use nitrogen

a)

assimilation

b)

denitrification

c)

fixation

d)

ammonification

42.

The nitrogen cycle includes ___________. (Pick 3)

a)

the atmosphere

b)

the sun

c)

the animals

d)

the soil

43.

According to this diagram, plants absorb

a)

nitrates

b)

nitrogen fixing bacteria

c)

animals

d)

decomposers

44.

Animals get nitrogen by ____________.

a)

breathing air

b)

eating plants

c)

dying

d)

being struck by lightning

45.

_____________ bacteria change the nitrates back into nitrogen gas that is then released back into the atmosphere.

a)

Denitrifying

b)

Nitrogen fixing

c)

Ammonifying

d)

Phagocytotic

46.

A correct path that nitrogen could take would be

a)

air -> animals -> plants -> bacteria

b)

animals -> air -> bacteria -> plants

c)

bacteria -> air -> plants -> animals

d)

air -> bacteria -> plants -> animals

47.
Organism that breaks down dead plants & animals and releases nitrogen back into atmosphere
a)
bacteria
b)
plants
c)
animals
d)
producers
48.

Plants and animals cannot use nitrogen directly from the air.

a)

True

b)

False

49.
How animals get the nitrogen they need
a)
from the air they breathe
b)
from the water they drink
c)
from the food they eat
d)
from the Sun
50.
Organisms that need nitrogen to survive
a)
only plants
b)
only animals
c)
only bacteria
d)
all living organisms
51.
Organisms that play a role in the nitrogen cycle
a)
only plants
b)
only animals
c)
only bacteria
d)
plants, animals, & bacteria
52.
Nitrogen rich fertilizers and manure can cause water pollution.
a)
True
b)
False
53.
How nitrogen is "fixed" into useable form for plants
a)
only through action of bacteria
b)
only through lightning
c)
through action of bacteria & lightning
d)
through photosynthesis
54.
Organism that breaks down dead plants & animals and releases nitrogen back into atmosphere
a)
bacteria
b)
plants
c)
animals
d)
producers
55.
How plants get the nitrogen they need
a)
from the air
b)
from the soil or water in which they live
c)
from the Sun
d)
from broken down rocks
56.
Gas that makes up almost 80% of Earth's atmosphere
a)
oxygen
b)
carbon dioxide
c)
nitrogen
d)
hydrogen
57.

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

a)

nitrogen composition

b)

nitrogen fixation

c)

ammonia

d)

denitrification

58.

What is the formula for atmospheric nitrogen?

a)

N

b)

N2

c)

NH3

d)

NO3

59.

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

a)

Assimilation

b)

Fixation

c)

Ammonification

d)

Denitrification

60.

Plants and animals cannot use nitrogen directly from the air.

a)

True

b)

False

61.

According to this diagram, plants use nitrogen to make _________________________

a)

bacteria

b)

animals

c)

proteins

d)

decomposers

62.

According to this diagram, plants absorb

a)

nitrates

b)

nitrogen fixing bacteria

c)

animals

d)

decomposers

63.

According to this diagram, animals get proteins from eating ________________________

a)

decomposers

b)

bacteria

c)

plants

d)

sunlight

64.

The process that allows organisms to use nitrogen

a)

assimilation

b)

denitrification

c)

fixation

d)

ammonification

65.

A correct path that nitrogen could take would be

a)

air -> animals -> plants -> bacteria

b)

animals -> air -> bacteria -> plants

c)

bacteria -> air -> plants -> animals

d)

air -> bacteria -> plants -> animals

66.

Bacteria fix nitrogen from the atmosphere into a form plants can use.

a)

True

b)

False

67.

Bacteria create a form of nitrogen that animals can use directly.

a)

True

b)

False

68.

In the nitrogen cycle, what does label A in the diagram represent?

a)

Gas

b)

Clouds

c)

Carbon dioxide in the atmosphere

d)

Nitrogen in the atmosphere

69.
What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?
a)
nitrogen composition
b)
ammonia 
c)
nitrogen fixation
d)
denitrification
70.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
71.
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.
72.
_____ is the conversion of organic nitrogen into ammonia
a)
Nitrogen Fixation
b)
Ammonification
c)
Denitrification
d)
Assimilation 
73.

What converts nitrogen gas into a usable form for plants and animals?

a)

bacteria

b)

rain

c)

fungi

d)

car exhaust

74.

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

a)

Assimilation

b)

Fixation

c)

Ammonification

d)

Denitrification

75.

According to this diagram, plants use nitrogen to make _________________________

a)

bacteria

b)

animals

c)

proteins

d)

decomposers

76.

A correct path that nitrogen could take would be

a)

air -> animals -> plants -> bacteria

b)

animals -> air -> bacteria -> plants

c)

bacteria -> air -> plants -> animals

d)

air -> bacteria -> plants -> animals

77.

The biological transformation of ammonia or ammonium to nitrites and nitrates.

a)

ammonification

b)

denitrification

c)

nitrification

d)

nitrogen fixation

78.

Which process makes nitrites from ammonia?

a)

ammonification

b)

denitrification

c)

nitrification

d)

nitrogen fixation

79.

What converts nitrogen gas into a usable form for plants and animals?

a)

bacteria

b)

rain

c)

fungi

d)

car exhaust

80.

How is nitrogen "fixed" into a usable form for plants?

a)

Through action of bacteria only

b)

Through lightning only

c)

Through action of bacteria and lightning

d)

Through photosynthesis

81.

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

a)

nitrogen composition

b)

nitrogen fixation

c)

ammonia

d)

denitrification

82.

What is the formula for atmospheric nitrogen?

a)

N

b)

N2

c)

NH3

d)

NO3

83.

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

a)

Assimilation

b)

Fixation

c)

Ammonification

d)

Denitrification

84.

Plants and animals cannot use nitrogen directly from the air.

a)

True

b)

False

85.

Match the following steps of the nitrogen cycle to how they move bacteria.

a)

Atmosphere to Geosphere

1.

Nitrogen Fixation

b)

Geosphere to Biosphere

2.

Assimilation

c)

Biosphere to Geosphere

3.

Ammonification

d)

Geosphere to Atmosphere

4.

Denitrification

86.

What is the original, and biggest reservoir of phosphorus on the planet?

a)

live plants and animals

b)

groundwater

c)

the atmosphere

d)

rocks

87.

Carbon is cycled on a global scale. Why does phosphorus cycling tend to occur more locally?

a)

it primarily involves the weathering 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

88.

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

a)

true

b)

false

89.

Phosphorus enters the cycle as

a)

atmospheric phosphate

b)

diphosphorus

c)

rock phosphate

d)

organic phosphate

90.

This is NOT a part of the phosphorus cycle.

a)

Phosphate is incorporated into sedimentary rocks

b)

Phosphate bound to soil

c)

Atmospheric phosphate

d)

Phosphate is absorbed from the soil by plants

91.
Phosphorous is passed from plants to ____ who eat them
a)
plants
b)
animals
c)
scavengers
92.
Which of the following statements is true of the phosphorus cycle?
a)
Phosphorus enters the atmosphere as phosphates.
b)
The phosphorus cycle utilizes the processes of erosion, and weathering.
c)
Phosphates are used in carbohydrate and glucose storage.
d)
The phosphorus cycle utilizes bacteria to breakdown phosphates and make them available for plants.
93.
What role do decomposers play in the phosphorous cycle?
a)
absorb phosphorous 
b)
release phosphorous into atmosphere
c)
return phosphorous into the soil
d)
combustion
94.

Too much phosphorus in waterways (rivers, lakes) can lead to___________.

a)

eutrophication

b)

Nothing

c)

Death

d)

diseases

95.

In general, algal blooms occur when

a)

toxins accumulate in shellfish.

b)

nutrients decrease in the water.

c)

nutrients increase in the water.

96.
_____ brings phosphorous into our waterways. .
a)
precipitation
b)

water runoff

c)
transpiration
d)
condensation
97.

An algal bloom is the rapid growth of a population of

a)

fungi

b)

protozoans

c)

algae

98.

Once inorganic phosphate has been released by weather of rocks, which of the following might be it's next step in the phosphorus cycle?

a)

it can become part of surface water and runoff into the ocean, and eventually become new rock at the bottom of the ocean through the process of sedimentation

b)

it can become part of the soil and be taken up by plant roots and used to make lipids, ATP, nucleic acids and other cellular molecules

c)

it can become part of groundwater and leech into the ocean, and eventually become new rock through the process of sedimentation

d)

all of the answers are possible pathways for phosphorus

99.

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

100.

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

101.

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

102.

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

103.

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

104.

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

a)

true

b)

false

105.

This is NOT a part of the phosphorus cycle.

a)

Phosphate is incorporated into sedimentary rocks

b)

Phosphate bound to soil

c)

Atmospheric phosphate

d)

Phosphate is absorbed from the soil by plants

106.

_____ brings phosphorous into our waterways. .

a)

Precipitation

b)

Runoff

c)

Transpiration

d)

Condensation

107.
Which of the following statements is true of the phosphorus cycle?
a)
Phosphorus enters the atmosphere as phosphates.
b)
The phosphorus cycle utilizes the processes of erosion, and weathering.
c)
Phosphates are used in carbohydrate and glucose storage.
d)
The phosphorus cycle utilizes bacteria to breakdown phosphates and make them available for plants.
108.
What role do decomposers play in the phosphorous cycle?
a)
absorb phosphorous 
b)
release phosphorous into atmosphere
c)
return phosphorous into the soil
d)
combustion
109.

This is released by the weathering of rocks.

a)

Carbonate

b)

Phosphate

c)

Phosphorus

d)

Nitrogen

110.

Too much phosphorus in waterways (rivers, lakes) can lead to___________.

a)

eutrophication

b)

nothing

c)

decreased pH levels

d)

diseases

111.

What is the phosphorus' symbol on the periodic table?

a)

P

b)

pH

c)

Ph

d)

PO

112.

The major sink for phosphorus is

a)

sedimentary rock

b)

atmospheric gases

c)

seawater

d)

plants

113.

In order to make a complete cycle for phosphorus, you need to make new rocks through heat, time, and pressure.

a)

TRUE

b)

FALSE

114.

What things add phosphorus to the soil? Check all that apply.

a)

Decomposition

b)

Erosion

c)

Excretion

d)

Lightning

e)

Respiration

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