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Year 7- Ecosystem Revision

Total questions: 93

Worksheet time: 1hrs 26mins

Name
Class
Date
1.

The system that contains all living things on Earth.

a)

Biosphere

b)

Atmoshpere

c)

Hydrosphere

d)

Geosphere

2.

All the non-living things in an environment

a)

Biotic

b)

Biome

c)

Abiotic

d)

Biosphere

3.

All living things in an environment

a)

Biotic

b)

abiotic

c)

geographic

d)

community

4.

A large region characterized by a specific type of climate and certain types of plant and animal communities.

a)

Biome

b)

Ecosystem

c)

Ecoregion

d)

Microhabitat

5.

Two or more different species interacting and living in an area.

a)

Biodiversity

b)

Habitat

c)

Community

d)

Microhanitat

6.

A living thing (one thing) that carry out life processes independently.

a)

organism

b)

abiotic

c)

community

d)

biosphere

7.
A consumer that hunts is called:
a)
a producer.
b)
an omnivore.
c)
a predator.
d)
a herbivore.
8.
All of the living AND non-living things in an particular area is called a(n):
a)
ecosystem
b)
house
c)
community
d)
mountain
9.
An organism that gets energy from eating other organisms is a ______________.
a)
producer
b)
consumer
c)
decomposer
d)
prey
10.
Grass is considered a ...
a)
consumer
b)
producer
c)
decomposer
d)
composers
11.
A ____________ breaks down waste or dead organisms and recycles nutrients.
a)
consumer
b)
producer
c)
decomposer
d)
omnivore
12.
An animal that is hunted for food.
a)
predator
b)
prey
c)
consumer
d)
decomposer
13.
An organism that cannot make its own food
a)
consumer
b)
producer
c)
tree
d)
leaf
14.
Which is the best description of an ecosystem?
a)
all of the living and nonliving things in an area
b)
all of the individuals of one species in an are
c)
all of the populations of living things in an area
d)
all of the abiotic factors in an area
15.
Which is a non-living part of an ecosystem?
a)
Sunlight
b)
Air
c)
Water
d)
All of these
16.
_________________ is the term to describe all the members of one species living in a particular area.
a)
Community
b)
Pod
c)
Population
d)
Gaggle
17.
A collection of organisms that belong to different populations but all live in the same area and interact with one another.
a)
Population
b)
Ecosystem
c)
Community
d)
Ecosphere
18.
Two organisms that are so similar they can interbreed in nature and produce fertile offspring
a)
biotic factor
b)
herbivore
c)
ecosystem
d)
species
19.
Nonliving factor that affects an ecosystem...
a)
biotic factor
b)
abiotic factor
c)
food chain 
d)
biome
20.
Identify the examples as: a organism, population, community, or ecosystem.
All speckled sting-ray that live in the Pacific Ocean
a)
Organism
b)
Population
c)
Community
d)
Ecosystem
21.
What are the ecological levels of organization from smallest to the largest?
a)
organism, population, community, ecosystem, biome, biosphere
b)
organism, community, population, ecosystem, biome, biosphere
c)
organism, population, community, biome, ecosystem, ecosphere.
d)
organism, community, population, biome, ecosystem, ecosphere
22.

Jacob is going out to his grandparents farm. On the farm is a stream that he likes to fish in. While he is fishing he sees many different species of fish as well as maple and oak trees and dragonflies. What Jacob is seeing is an example of what level of organization?

a)

organism

b)

population

c)

community

d)

ecosystem

23.

What is the smallest level of ecological organization

a)

community

b)

ecosystem

c)

organism

d)

population

24.
A place where an organism lives.
a)
Terrain
b)
Habitat
c)
Community
d)
Population
25.
An ecosystem contains living and nonliving things.
a)
True
b)
False
26.

Water temperature would be an example of ...

a)

a biotic factor

b)

an abiotic factor

c)

an antibiotic factor

d)

a bacterial factor

27.

What are the biotic factors in this image?

a)

sunlight, elephants, grasses

b)

sunlight, water, air

c)

elephants, plants, trees

d)

elephants, clouds, grasses

28.
What level of organization can be observed in the image?
a)
Species
b)
Population
c)
Community
d)
Ecosystem
29.

___________is an organism that eats animals for energy.

a)

Omnivores

b)

Herbivores

c)

Carnivores

30.

The animals that eat only plants are known as?

a)

omnivore

b)

herbivore

c)

carnivore

d)

vegevore

31.

A bear can eat berries and salmon fish. What type of organism eat both plants and animals?

a)

carnivore

b)

producer

c)

herbivore

d)

omnivore

32.

State the relationship between a fox and a rabbit .

a)

commensalism

b)

predator and prey

c)

parasitism

d)

mutualism

33.

Fungi is an example of a decomposer

a)

true

b)

false

34.

Producers are:

a)

animals

b)

rocks

c)

plants

35.

Plants are called producers because they can produce their own:

a)

music

b)

food

c)

air

36.

A food chain is:

a)

an animal that eats only plants.

b)

a diagram that shows how energy moves from one organism to another. (Grass>Mouse>Owl)

c)

An animal that is hunted and eaten by another animal.

37.

A living thing that breaks down dead plants and animals - such as, fungi, worms, bacteria, is:

a)

decomposer

b)

food web

c)

omnivore

38.

A system of many food chains that interact with each other:

a)

predator

b)

consumer

c)

food web

39.
Who does the owl get energy from? 
a)
Grass
b)
Grasshopper
c)
Mouse
d)
Ow
40.
Who is the producer in this food chain? 
a)
Grass
b)
Grasshopper
c)
Mouse
d)
Ow
41.
Who does the grasshopper get energy from? 
a)
Grass
b)
Grasshopper
c)
Mouse
d)
Ow
42.
What percentage of energy is passed on to each tropic level?
a)
10%
b)
50%
c)
90%
d)
100%
43.
Where does the energy start in this food chain?
a)
Plant
b)
Sun
c)
Deer
d)
Wolf
44.
What is the role of a producer?
a)
Use sunlight to make food
b)
Gain energy from eating other organisms
c)
Keep other species from overpopulating
d)
Breaking down dead stuff 
45.
Which of these organisms would receive energy from the snake?
a)
Plant
b)
Rabbit
c)
Mouse
d)
Hawk
46.
What does a food chain represent?
a)
How all living organisms within a habitat are connected.
b)
All of the things that a particular animal eats.
c)
How plants create their own food.
d)
A single path of energy transfer within a habitat.
47.
The arrows in a food chain or web represents what?
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show what direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
48.
What is a trophic level?
a)
Each level represented within a food chain or web.
b)
Levels of ecosystems that the world is divided into.
c)
Different levels of nutrients present within an organism.
d)
The levels of sunlight an autotroph needs to survive. 
49.
An energy pyramid represents what?
a)
How much sunlight is available for the ecosystem to use. 
b)
How much energy a particular organism needs. 
c)
How much energy is needed to build a pyramid. 
d)
The amount of energy available to the next 'feeder' in a food web.
50.
Why is there a limited amount of energy that can be passed on to the next feeding level?
a)
There is never enough sunlight available. 
b)
Some ecosystems have limited resources. 
c)
Organisms use some of the energy they get from eating.
d)
All the energy is available to be passed on. 
51.
The largest group of organisms found in a food web would be:
a)
Primary Consumers
b)
Producers
c)
Decomposers
d)
Tertiary Consumers
52.
If there is more food than usual in an ecosystem, then...
a)
Populations will stay the same
b)
Populations will decrease
c)
Populations will increase
53.
If the population of a certain predator increases, there is often _______ its prey
a)
a decrease the population of
b)
an increase of the population of 
c)
great news for its prey of
d)
no  impact found on
54.

What is the role of decomposers in the food chain?

a)

to consume plants and animals

b)

to produce food using energy from the sun

c)

to eat decaying matter and return nutrients to the soil

d)

to hunt prey

55.
a deer population has significantly increased, the best hypothesis is 
a)
the deer's main predator has been eliminated
b)
competition increased
c)
decreased water levels of local ponds
d)
organisms that rely on similar food sources migrated to the area
56.
an organism that can produce its own food through photosynthesis
a)
consumer
b)
heterotroph
c)
autotroph
d)
herbivore
57.

Which of the following is producer/autotroph?

a)

rabbit

b)

frog

c)

tree

d)

worm

58.

Using the food web which of the following is a primary consumer?

a)

butterfy

b)

snake

c)

fox

d)

frog

59.

Using food web which of the following is a secondary consumer?

a)

snake

b)

worm

c)

butterfy

d)

squirrel

60.

Using the food web which of the following is a tertiary consumer?

a)

frog

b)

bird

c)

eagle

d)

worm

61.

Using the food web what would happen if the eagle became extinct?

a)

The frog population would decrease.

b)

The frog population would increase.

c)

The butterfly population would increase.

d)

The snake population would decrease.

62.

The number of organisms at the top of the energy pyramid are usually smaller because the hawk

a)

needs more energy

b)

has more predators

c)

have more offspring

d)

eat producers

63.

Which two animals below are primary consumers

a)

moth and ant

b)

mushroom and moth

c)

ant and hawk

d)

spider and mouse

64.

Which of the following is a tertiary consumer?

a)

hawk

b)

mouse

c)

moth

d)

spider

65.
The rabbit in this food web would be considered a:
a)
Decomposer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
66.
What does a Secondary Consumer eat?
a)
Tertiary Consumers
b)
Primary Consumers
c)
Producers
d)
Secondary Consumers
67.
Energy increases as you move up the food pyramid (from bottom to top).
a)
True 
b)
False
68.
Why might an organism have more than one arrow coming from them in a food web?
a)
More than one organism may eat them. 
b)
They may eat more than one other organism. 
c)
This organism gets its energy from multiple sources. 
d)
They have no resources available to them.
69.

The fox in this food web would be considered a:

a)

3rd level Consumer

b)

Producer

c)

2nd level Consumer

d)

Primary Consumer

70.

In the diagram, which organism provides nutrients for the

largest number of other organisms?

a)

Seal

b)

Herring

c)

Snapper

d)

Bluefish

71.
A population of mice lives in a barn community. A cat population has just joined the community. What will happen?
a)
Mouse and cat populations both go up?
b)
Mouse and cat populations both go down
c)
Mouse population goes down as cat population goes up
d)
Mouse population goes up as cat population goes down
72.
What might happen if you remove a primary consumer from the ecosystem?
a)
There would be more food for secondary consumers.
b)
The number of primary consumers would increase.
c)
The number of plants would increase.
d)
The number of secondary consumers would increase.
73.
Identify the correct food chain that demonstrates the energy flow of this food web
a)
Plant > Caterpillar > Bluebird > Eagle
b)
Plant > Lizard > Snail
c)
Plant >Lizard > Snail >Eagle
d)
Eagle >Lizard>Caterpillar>Plant
74.
Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?
a)
There would be a decrease in the small bird population.
b)
There would be a decrease in the grass/flowers population.
c)
There would be a decrease in the mice population.
d)
There would be an increase in the grass/flowers population.
75.
How do producers obtain energy?
a)
They conduct photosynthesis.
b)
They consume plants.
c)
They consume primary consumers.
d)
They consume secondary consumers.
76.
In this food chain, what will happen if the frogs become extinct?
a)
The snakes will increase.
b)
The grasshoppers will decrease.
c)
The eagles will remain the same.
d)
The grasshoppers will increase.
77.
How many herbivores are in this web?
a)
1
b)
2
c)
3
d)
4
78.
What may happen if the snowshoe hare was removed from the food web pictured?
a)
The insects in the habitat would increase.
b)
The shrew population would decrease due to being only hawk food source.
c)
The willow tree population would decrease.
d)
Foxes would dies due to no food source. 
79.
All energy on Earth ultimately comes from what source?
a)
Water
b)
Sun
c)
Consumers
d)
Oxygen
80.

An animal that feeds only on secondary consumers.

a)

Abiotic organisms

b)

Primary consumers

c)

Secondary consumers

d)

Tertiary Consumers

81.

These animals eat primary consumers.

a)

Secondary Consumers

b)

Producers

c)

Herbivores

d)

Abiotic Organisms

82.

The arrows on a food web...

a)

...show who moving where

b)

...shows the direction the energy is moving to

c)

...shows who is wasting energy

d)

...shows who is friends with who

83.
What is the purpose of a dichotomous key?
a)
to find a common ancestor
b)
to show the evolution of organisms
c)
to show relationships between organisms
d)
to identify organisms
84.
A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
85.
What step do we always start with when using dichotomous keys?
a)
1
b)
2
c)
3
d)
4
86.
When using a dichotomous key to identify organisms, what do we look at?
a)
physical features
b)
weather patterns
c)
environment
d)
diet
87.
An illustration and a dichotomous key are given. What is the correct classification for this organism?
a)
Class Insecta
b)
Order Amblygygi
c)
Order Araneae
d)
Order Scorpiones
88.

How many options should every branch in a dichotomous key have?

a)

1

b)

2

c)

3

d)

4

89.

Which of the following organisms is M. erminea?

a)

A

b)

B

c)

C

d)

D

e)

E

90.
A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?
a)
Coleoptera
b)
Heteroptera
c)
Diptera
d)
Lepidoptera
91.
When using a dichotomous key to identify organisms, what do we look at?
a)
physical features
b)
weather patterns
c)
environment
d)
diet
92.
A botanist discovers a new plant in the jungle. Which of the
following observations of the plant’s characteristics would be useful in determining its identity with a dichotomous key?
a)
It was discovered in the summertime
b)
It is wet from a recent rain storm.
c)
Its leaves curl up on the edges.
d)
It is eaten by native jungle ants.
93.

Which leaf is shown in the drawing?

a)

Magnolia

b)

Redbud

c)

Sweetgum

d)

None of the above

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