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Unit 7: Ecosystems

Total questions: 22

Worksheet time: 14mins

Name
Class
Date
1.

A __________ is all of the living and nonliving things in a certain area.

a)

population

b)

community

c)

species

d)

ecosystem

2.

A _______ is a group of similar organisms that can breed and produce fertile offspring.

a)

population

b)

community

c)

species

d)

ecosystem

3.

A _______ is all the different populations that live together in an area.

a)

population

b)

community

c)

species

d)

ecosystem

4.

A __________ is all the members of one species that live together in an area.

a)

population

b)

community

c)

species

d)

ecosystem

5.

The biosphere is ___________

a)

all organisms in a particular area

b)

all organisms on earth

c)

all organisms and the part of Earth where they exist

d)

the Earth

6.

In the example food chain of grass>mouse>snake>hawk>mushroom, the mouse is a ________

a)

producer

b)

primary consumer

c)

secondary consumer

d)

tertiary consumer

7.

In the example food chain of grass>mouse>snake>hawk>mushroom, the mushroom is a _______.

a)

producer

b)

consumer

c)

decomposer

8.

In ocean life, a food chain might look like this: phytoplankton>copepod>sardine>mackerel>tuna>shark. If an orca eats the shark, what level consumer would it be?

a)

4

b)

5

c)

6

d)

7

9.

Select all of the following that are producers.

a)

grass

b)

soil

c)

ants

d)

trees

10.

Food chains show simple connections between different organisms. An overlapping network of food chains is called a ____________.

a)

food web

b)

food cycle

c)

consumer chain

d)

consumer cycle

11.

Producers require certain things in order to perform photosynthesis. Select everything that is needed.

a)

sunlight

b)

water

c)

nitrogen

d)

carbon dioxide

12.

Select all products of photosynthesis.

a)

water

b)

oxygen

c)

glucose

d)

carbon monoxide

13.

_______ is anything that has mass and takes up space.

a)

atoms

b)

matter

c)

energy

d)

light

14.

A water molecule is made of ___ hydrogen atoms and ___ oxygen atoms.

a)

1,2

b)

2,1

c)

2,3

d)

3,2

15.

A carbon dioxide molecule is made of ___ carbon atoms and ___ oxygen atoms.

a)

3,4

b)

4,3

c)

2,1

d)

1,2

16.

What is the formula for glucose?

a)

C6H6O6

b)

C12H12O6

c)

C6H12O8

d)

C6H12O6

17.

Carnivores only eat other animals. Herbivores only eat plants. Omnivores eat what?

a)

only animals

b)

only mushrooms

c)

bacteria and plants

d)

animals and plants

18.

In an ecosystem, there are many different species that interact with each other. However, some species are VERY important to the ecosystem. These are called _____________.

a)

alpha species

b)

critical species

c)

keystone species

d)

primary species

19.

If you were using the snap blocks to make a model of a water molecule, how many blocks would you need?

a)

2

b)

3

c)

6

d)

24

20.

Balance the equation:

sunlight + ___CO2 + ___ H20 --> ___C6H12O6 + ___ O2

a)

4,4,2,4

b)

6,6,1,6

c)

6,4,1,4

d)

4,4,4,4

21.

Select all that are cycled in an ecosystem.

a)

energy

b)

grass seeds

c)

matter

d)

soil

22.

The law of conservation of matter says that matter can neither be ________ or ________, only transformed.

a)

created, destroyed

b)

created, maintained

c)

destroyed, separated

d)

separated, maintained