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The Flow of Energy Drives the Cycling of Matter in Ecosystem

Total questions: 32

Worksheet time: 51mins

Name
Class
Date
1.
Which organism is likely to be at the beginning of a food chain for a pond?
a)
Sunfish
b)
Freshwater shrimp
c)
Paramecium
d)
Green Algae
2.
What is indicated by the diagram?
a)
Food web
b)
Food chain
c)
Food map
d)
Food menu
3.

An organism that eats both plants and animals is known as a(n)

a)

Carnivore

b)

Omnivore

c)

Herbivore

d)

Decomposer

4.

What is the first source of energy for almost all food webs?

a)

Plants

b)

Sunlight

c)

Mineral in the soil

d)

Decomposers

5.
What organisms are at the bottom of an energy pyramid?
a)
Producer
b)
Consumer
c)
Decomposer
d)
Scavenger
6.
How much energy is passed on to each trophic level in an energy pyramid?
a)
10%
b)
90%
c)
50%
d)
80%
7.

Which organisms have the most available energy in an energy pyramid?

a)

Producers

b)

Consumers

c)

Decomposers

d)

Detritivores

8.
Where do crickets get their energy?
a)
Cattails
b)
Marsh Grass
c)
Grasshoppers
d)
Shrews
9.
If additional snakes are introduced into this ecosystem, there will most likely be an immediate decrease in the _________.  
a)
hawk population
b)
rabbit population
c)
wildflower population
d)
grass population
10.

Energy CANNOT be...

a)

Given to your friend

b)

Lost to the environment as heat

c)

Created or destroyed

d)

transferred to the surroundings

11.

A producer is an organism that...

a)

breaks down waste

b)

eats other animals

c)

a herbivore

d)

makes its own food

12.

A consumer is an organism that...

a)

breaks down waste

b)

eats other animals

c)

does photosynthesis

d)

makes its own foods

13.
A food chain is?
a)
Overlapping food chains in an ecosystem.
b)
The amount of energy that moves from one feeding level to another in a food web.
c)
A series of events in which one organism eats another and obtains energy.
d)
biotic and abiotic factors in an area.
14.

Organisms that break down wastes and dead organisms and return the raw materials to the environment

a)

Producer

b)

Consumer

c)

Decomposer

15.
The arrows in a food chain or web represent ...
a)
They point to the organism that is being eaten.
b)
It shows how sunlight flows within an ecosystem.
c)
They show the direction the energy is flowing between organisms. 
d)
They represent how water is transferred within a habitat.
16.

Which cycle is shown in this diagram?

a)

Nitrogen

b)

Carbon

c)

Phosphorus

d)

Water

e)

Oxygen

17.

Which cycle is shown in this diagram?

a)

Nitrogen

b)

Carbon

c)

Phosphorus

d)

Water

e)

Oxygen

18.

Which cycle is shown in this diagram?

a)

Nitrogen

b)

Carbon

c)

Phosphorus

d)

Water

e)

Oxygen

19.

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

a)

bacteria

b)

rain

c)

fungi

d)

car exhaust

20.

Humans and animals can use nitrogen directly from the atmosphere (N2).

a)

True

b)

False

21.

Earth's atmosphere is made up of how much nitrogen?

a)

60%

b)

28%

c)

98%

d)

78%

22.

What drives the water cycle, by providing the energy for water to evaporate?

a)

The moon

b)

The sun

c)

A car

d)

The earth

23.
What gas do leaves absorb during the day?
a)
Helium
b)
Carbon dioxide
c)
Nitrogen
d)
Hydrogen
24.
 Energy is transferred through a food web.
a)
True
b)
False
25.
What is the water cycle?
a)
the 3 forms of water
b)
the movement of water on, above, or below the surface of the Earth
c)
when water melts
d)
when clouds form
26.
What comes after 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
27.

Carbon enters the soil through dead plant or animal matter.

a)

Decomposition

b)

Respiration

c)

Photosynthesis

d)

Diffusion

28.
All of the carbon in existence is continually recycled in the carbon cycle
a)
True
b)
False
29.

Carbon molecules cannot be created or destroyed

a)

True

b)

False

c)

Not enough information to answer

30.
Organisms that break down dead plants & animals and release nitrogen back into atmosphere...
a)
bacteria
b)
plants
c)
animals
d)
producers
31.
Organisms that need nitrogen to survive
a)
only plants
b)
only animals
c)
only bacteria
d)
all living organisms
32.

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

a)

bacteria

b)

rain

c)

fungi

d)

car exhaust

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