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Interdependent Relationships in Ecosystems

Total questions: 61

Worksheet time: 52mins

Name
Class
Date
1.
The nonliving parts of an ecosystem are called
a)
biotic factors
b)
dead things
c)
abiotic factors
d)
asymmetrical factors
2.
Sunlight, water, oxygen, temperature, and soil are all
a)
biotic factors
b)
abiotic factors
c)
living things
d)
homeostasis
3.
A tick living on a dog and taking its blood is an example of 
a)
commensalism
b)
predation
c)
mutualism
d)
parasitism
4.

Fish picking off and eating bits of algae or parasites from a turtle's shell is an example of

a)

competition

b)

predation

c)

commensalism

d)

mutualism

5.
Male giraffes fighting for a female giraffe is an example of 
a)
competition
b)
predation
c)
symbiosis
d)
craziness!
6.
The living parts of an ecosystem are called
a)
abiotic factors
b)
biotic factors
c)
biology
d)
microbiology
7.
Organisms interact with biotic and abiotic factors in an
a)
ecosystem
b)
ecology
c)
ecologist
8.
____________________ study how organisms interact with biotic and abiotic factors in an ecosystem.
a)
Chemists
b)
Biologists
c)
Ecologists
d)
Geologists
9.
A consumer that hunts is called:
a)
a producer.
b)
an omnivore.
c)
a predator.
d)
a herbivore.
10.
What is prey?
a)
An organism that is consumed
b)
An organism that consumes
c)
neither
11.

The number of organisms within a certain defined area is called a ________________?

a)

population

b)

community

c)

niche

12.

If an organism is living inside another and causing it harm, it is an example

a)

mutualism

b)

commensalism

c)

parasitism

13.

If two organisms benefit from a relationship (++), it is called

a)

mutualism

b)

commensalism

c)

parasitism

14.

If two organisms have a relationship in which only one benefits (+,0), it is an example of

a)

mutualism

b)

commensalism

c)

parasitism

15.

The struggle between organisms to survive in a habitat with limited resources is called

a)

competition

b)

predation

c)

symbiosis

d)

parasitism

16.

Mutualism, commensalism, and parasitism are examples of

a)

competition

b)

symbiotic relationships

c)

prey adaptations

d)

predation

17.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
18.
How do 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
19.
Why do all organisms need nitrogen?
a)
To live and grow 
b)
To build phosphorus
c)
To make oxygen levels grow
d)
To help blood circulate better
20.
Nitrogen fixing bacteria, lives in nodules on the root of a plant called
a)
Broccoli
b)
Legumes
c)
Beats
d)
Carrots
21.

What converts some atmospheric nitrogen into nitrates that organisms can use?

a)

Sun

b)

Rain

c)

Thunder

d)

Lightning

22.
Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert
a)
nitrates intro nitrogen gas
b)
ammonia into proteins
c)
nitrogen gas into ammonia
d)
proteins into nitrates
23.
Animals obtain the nitrogen they need directly from the
a)
soil in their habitat
b)
air they breathe
c)
plants they eat
d)
bacteria living within them
24.
Nitrogen is the most plentiful gas in the atmosphere.
a)
True
b)
False
25.
Plants and animals cannot use nitrogen directly from the air.
a)
True
b)
False
26.
What converts nitrogen into a useable form for plants and animals?
a)
bacteria
b)
fungi
c)
rain
27.
After plants and animals contain nitrogen, what puts it back into atmosphere and soil?
a)
decomposition
b)
precipitation
c)
condensation
d)
bacteria
28.

Organisms use nitrogen to form

a)

carbohydrates and lipids

b)

proteins and lipids

c)

lipids and nucleic acids

d)

proteins and amino acids

29.

Which process moves carbon stored in fossil fuel into atmospheric carbon?

a)

When fossil fuels are burned, carbon enters the atmosphere as carbon dioxide.

b)

The denitrifying bacteria turns the fossil fuel into carbon dioxide gas.

c)

Decomposers convert the fossil fuels into greenhouse gases like carbon dioxide.

d)

The fossil fuels react with the soil to produce carbonates and carbon dioxide.

30.
Bacteria fix nitrogen on plant roots. Plant roots provide sugar to bacteria. This is an example of
a)
mutualism
b)
parasitism
c)
commensalism
d)
competition
31.
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
32.
In the carbon cycle, producers take in the gas __
a)
carbon dioxide
b)
oxygen
c)
nitrogen
d)
carbon monoxide
33.
Carbon dioxide is produced by the burning of fossil fuels
a)
True
b)
False
34.

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

35.

Carbon dioxide is a gas produced by ________ and used by __________

a)

plants and animals

b)

carbon and photosynthesis

c)

animals and plants

d)

photosynthesis

36.

Planting large numbers of trees result in __________

a)

a decrease in oxygen production

b)

an increase in oxygen production

c)

oxygen and carbon dioxide increasing

d)

carbon dioxide and oxygen decreasing

37.
If the plant population decreased, the amount of carbon would _________.
a)
Stay the same
b)
Increase
c)
Decrease
38.

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

39.

How do plants affect the air that animals and people breathe?

a)

Plants use oxygen from the air to make their own food

b)

Plants release pollution into the air

c)

Plants take in carbon dioxide and release oxygen

d)

Plants take in oxygen and release carbon dioxide

40.

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

a)

Water

b)

Carbon Dioxide

c)

Oxygen

d)

Sugar

41.

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

a)

Carbon dioxide

b)

Oxygen

c)

Sunlight

d)

Water

42.

The circulation of the element Carbon among Earth's atmosphere, land, oceans, and organisms is called _____________.

a)

the Carbon Cycle

b)

the Oxygen Cycle

c)

the Carbon dioxide Cycle

d)

the Water Cycle

43.
What is the difference between biotic and abiotic?
a)
Biotic are non-living things
b)
Abiotic are living organisms
c)
Biotic is life,
Abiotic is non-living
d)
Biotic is non-living, Abiotic is living
44.
What does biodiversity mean?
a)
Only one species in an area.
b)
The different amount of species in an area
c)
All abiotic life
d)
Nitrogen fixation
45.

A group of organisms or a population of different species that live in one area together and interact.

a)

limiting factors

b)

populations

c)

community

d)

speed limit

46.
The step in the nitrogen cycle where bacteria convert ammonia (NH3) to nitrate (NO3-) is:
a)
nitrification
b)
ammonification
c)
nitrogen fixation
d)
assimilation
47.

The process where some bacteria remove nitrate from the soil by converting it to nitrogen gas is:

a)

ammoniafication

b)

nitrogen fixation

c)

denitrification

d)

nitrification

48.
What part of the nitrogen cycle deals with the conversion of nitrogen in waste products or dead organisms into ammonia?
a)
nitrification
b)
ammonification
c)
denitrification
d)
nitrogen fixation
49.

If two organisms have a relationship in which one benefits and the other is harmed (+,-), it is an example of

a)

mutualism

b)

commensalism

c)

parasitism

50.
What part of the water cycle does this picture show?
a)
condensation
b)
precipitation
c)
evaporation
51.
Which is the opposite of condensation?
a)
runoff
b)
evaporation
c)
precipitation
d)
transpiration
52.
Snow, sleet, hail, and rain are all examples of  ________________. 
a)
evaporation
b)
condensation
c)
accumulation
d)
precipitation
53.
The first step in the water cycle 
a)
evaporation
b)
condensation 
c)
precipitation
d)
there is no first step 
54.
Evaporation of water vapor from plants 
a)
infiltration
b)
condenstaion
c)
precipitation
d)
transpiration 
55.

_____________ is when the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam.

a)

Evaporation

b)

Condensation

c)

Precipitation

d)

Transpiration

56.

Water vapor in the air gets cold and changes back into liquid, forming clouds.

a)

Evaporation

b)

Condensation

c)

Precipitation

d)

Transpiration

57.

The clouds get heavy and water falls back to the earth in the form of rain, hail, sleet or snow.

a)

Evaporation

b)

Condensation

c)

Precipitation

d)

Transpiration

58.

What is water cycle?

a)

The 3 forms of water

b)

When water melts

c)

The movement on water on, above, or below the surface of the Earth

d)

When clouds form

59.

What 2 Ways is nitrogen taken in from the air?

a)

When animals breathe

b)

By lightning

c)

From forest fires

d)

By the bacteria on plant roots

e)

By plants during photosynthesis

60.
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
61.
All of the carbon in existence is continually recycled in the carbon cycle
a)
True
b)
False

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