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Skill C Energy and Energy Flow

Total questions: 39

Worksheet time: 49mins

Name
Class
Date
1.
Another word for a producer is a(an) ___________________.
a)
Heterotroph
b)
Primary consumer
c)
Detritivore
d)
Autotroph
e)
Decomposer
2.
Why are producers important in an ecosystem?
a)
The break down dead organisms and recycle nutrients
b)
They make energy from the Sun or chemicals available to other organisms in a community
c)
The consume primary consumers, regulating those population sizes and preventing them from growing uncontrollably
d)
They prevent energy loss as energy travels through food chains
3.
Which type of organism is sometimes capable of chemosynthesis?
a)
Primary consumers
b)
Decomposers
c)
Tertiary consumers
d)
Producers
e)
Detritivores
4.
Which organism is a primary consumer?
a)
Wolf
b)
Deer
c)
Mushroom
d)
Oak tree
5.
Secondary consumers can be…
a)
Herbivores only
b)
Herbivores or producers
c)
Omnivores or carnivores
d)
Omnivores only
e)
Carnivores only
6.
What happens to energy as it moves through a food chain?
a)
It increases as it passes from one level to the next
b)
It remains constant
c)
It decreases as it passes from one level to the next
d)
It is destroyed
7.
What would happen if producers were removed from an ecosystem?
a)
Primary consumers would increase
b)
Energy flow would stop, collapsing the ecosystem
c)
Decomposers would replace them to maintain the ecosystem
d)
Secondary consumers would become primary producers
8.
What would happen if decomposers were removed from an ecosystem?
a)
Nutrients would stop being recycled
b)
Primary consumers would become producers
c)
The Sun would provide more energy
d)
Secondary consumers would become tertiary consumers
9.
What is the purpose of cellular respiration?
a)
To convert solar energy into sugar
b)
To convert chemical energy into sugar
c)
To convert sugars into usable energy
10.
Which organism in the following food chain is the primary consumer? Creosote bush → kangaroo rat → sidewinder rattlesnake → coyote
a)
The Sun
b)
Sidewinder rattlesnake
c)
Creosote bush
d)
Kangaroo rat
e)
Coyote
11.
In a trophic pyramid, which level contains the least energy?
a)
Producers
b)
Primary consumers
c)
Secondary consumers
d)
Tertiary consumers
12.
What is the Rule of 10%?
a)
Only 10% of energy is passed to the next trophic level
b)
As energy passes from trophic level to trophic level, it increases by 10%
c)
On average, 10% of organisms survive each year in each ecosystem
d)
10% of food chains include producers
e)
10% of species are decomposers
13.
Which trophic level has the most biomass?
a)
Tertiary consumers
b)
Secondary consumers
c)
Primary consumers
d)
Producers
14.
Which organism is at the highest trophic level in the following food chain? Algae → krill → salmon → bald eagle
a)
Algae
b)
Krill
c)
Salmon
d)
Bald eagle
15.
Detritivores eat non-living, decaying organic matter. –
a)
True
b)
False
16.

When energy is transferred between trophic levels, the amount of available energy lost is about

a)

90 percent

b)

50 percent

c)

25 percent

d)

10 percent

17.

Any being that uses the sun’s energy to create sugars is a

a)

producer.

b)

secondary producer.

c)

primary consumer.

d)

secondary consumer.

18.

The ultimate source of energy in an ecosystem in which deer eat grass and coyotes eat deer is

a)

the grass

b)

the sun

c)

the deer

d)

chemosynthesis

19.

In a food web that consists of grass, mice, deer, coyotes, and hawks, which species is likely to have the greatest biomass?

a)

grass

b)

mice

c)

coyotes

d)

hawks

20.

The first level of all food pyramids

a)

consists of primary producers.

b)

consist of primary consumers.

c)

is chemosynthesis.

d)

is photosynthesis.

21.

What do the arrows in a food web represent?

a)

who eats who

b)

energy transfers

c)

photosynthesis

d)

how the organisms interact

22.

Which of the following is a producer?

a)

maple tree

b)

racoon

c)

cockroach

d)

human

23.

Which of the following organisms would be found at the top of an energy pyramid?

a)

algae

b)

coral

c)

leopard seal

d)

killer whale

24.

An organism that must get nutrients by eating other organisms is called a

a)

consumer

b)

producer

c)

decomposer

25.

This is the process by which producers use sunlight to convert CO2 and H2O into sugars

a)

photosynthesis

b)

chemosynthesis

c)

cellular respiration

d)

all of these

26.

Some bacteria use hydrothermal vents deep in the ocean to undergo the process of chemosynthesis instead of photosynthesis.

a)

true

b)

false

27.

A biomass pyramid illustrates the number of organisms that are at each trophic level

a)

true

b)

false

28.

In what form is the energy lost as when we go up the food chain?

a)

heat

b)

ice

c)

consumable

d)

lightning

29.

Which of the following pairs of organisms probably belong to the same trophic level?

a)

human and bear

b)

bear and deer

c)

humans and cows

30.

The ecological efficiency rule of 10% states that about 10% of energy is passed on to each trophic level

a)

true

b)

false

31.
What type of pyramid does this show?
a)
biomass
b)
energy
c)
numbers
d)
producers
32.

What is biomass?

a)

the total dry weight of organisms in an ecosystem

b)

the total volume of organisms in an ecosystem

c)

the total dry weight of producers in an ecosystem

d)

the total volume of animals in an ecosystem

33.
Why are producers found at the base of the pyramid?
a)
They create all of the energy and therefore have the most energy of all of the trophic levels
b)
There are more plants than animals. 
c)
They begin the flow of energy in an ecosystem.
d)
All of these answers are correct. 
34.

What are the "producers" levels in the two pyramids most likely referring to?

a)

different ecosystems, the numbers are different

b)

the same ecosystem, looking whole verses parts of the producer

c)

the same ecosystem, during different times

d)

there is no correct answer, not enough information is given

35.
Which of these organisms would receive energy from the snake?
a)
Plant
b)
Rabbit
c)
Mouse
d)
Hawk
36.
The primary consumer in this food chain is the ____________.
a)
Frog
b)
Eagle
c)
Grasshopper
d)
Python
37.

A simple "line" of plants and animals that transfer energy by the process of eating.

a)

Food Chain

b)

Food Web

c)

Ecosystem

d)

Decomposers

38.

Interconnected feeding relationships within an ecosystem that transfer energy from producers to consumers.

a)

Food Chain

b)

Food Web

c)

Decomposer

d)

Ecosystem

39.

Explain how energy flows through an ecosystem, starting from the sun and ending with decomposers.

a)

Energy is captured by producers, transferred to consumers, and finally to decomposers.

b)

Energy is captured by decomposers, transferred to consumers, and finally to producers.

c)

Energy is captured by consumers, transferred to producers, and finally to decomposers.

d)

Energy is captured by decomposers, transferred to producers, and finally to consumers.

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