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WorksheetsFood Chains, Food Webs, Ecosystem
Total questions: 20
Worksheet time: 5hrs 0mins
Name
Class
Date
1.
What are plants called in a food chain?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Scavengers
2.
What are animals called in a food chain?
a)
Producers
b)
Consumers
c)
Decomposers
d)
Plants
3.
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
4.
What is the role of decomposers in a food chain?
a)
Use sunlight to make food
b)
Eat other organisms to gain energy
c)
Make the food for the whole food chain
d)
Break down dead organisms and add nutrients to the soil
5.
Which of these organisms would receive energy from the snake?
a)
Plant
b)
Rabbit
c)
Mouse
d)
Hawk
6.
Which food chain is in the correct order?
a)
cat, grass, bird, snail
b)
bird, snail, grass, cat
c)
grass, snail, bird, cat
d)
grass, cat, bird, snail
7.
Molds, bacteria, and worms are ________.
a)
decomposers
b)
producers
c)
consumers
d)
food chains
8.
In this image, the grass is the ______________.
a)
Primary Consumer
b)
Secondary Consumer
c)
Heterotroph
d)
Producer
9.
An organism, like bacteria, that breaks down dead plant or animal matter and releases their nutrients back into the soil is called:
a)
Omnivores
b)
Herbivores
c)
Decomposers
d)
Carnivores
10.
The primary consumer in this food chain is the ____________.
a)
Frog
b)
Eagle
c)
Grasshopper
d)
Python
11.
Which of the animals in this food web is a secondary consumer?
a)
Hawk
b)
Lizard
c)
Mouse
d)
Snake
12.
Which animal is a tertiary consumer?
a)
Jackal
b)
Wild Cat
c)
Lion
d)
Owl
13.
What level consumer is the deer?
a)
primary
b)
secondary
c)
tertiary
d)
producer
14.
Which organism do the owl and the weasel compete for in the food web?
a)
Hawk
b)
Spider
c)
Grasshopper
d)
Shrew
15.
These mushroom are heterotrophs and must therefore get nutrients from other organic matter. Mushroom aslo act as ____________________ in many food webs.
a)
Herbivore
b)
Decomposer
c)
Carnivore
d)
Omnivore
16.
An environmental change that removed which of these organisms from the ecosystem would cause the most instability in the ecosystem?
a)
Auklets
b)
Foxes
c)
Salmon
d)
Zooplankton
17.
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.
18.
A decreases in the grass population will most immediately decrease the available energy for the
a)
snake
b)
deer
c)
mouse
d)
frog
19.
Different students drew illustrations of the flow of energy in an ecosystem.
Which student is most accurate?
a)
Student 1
b)
Student 2
c)
Student 3
d)
Student 4
20.
When water used to cool machinery is retured to a river, it raises the river’s water temperature. This causes a sharp decline in small invertebrate populations. Based on the food web, a likely consequence of this change would be
a)
(1) An increase in the number of clams
b)
(2) An increase in the number of crabs
c)
(3) A decrease in the number of water plants
d)
(4) A decrease in the number of crayfish
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