Life Science Quiz 3 - Ecosystems and Food Chains

If all the owls in an area died, what would happen to the population of mice?
1. The population of mice would decrease.
2. The mouse population would increase.
3. There would be more owls.
4. The number of mice would be the same.
If all the deer in an area died, what might happen to the population of wolves?
1. The population of wolves would increase.
2. The population of wolves would stay the same.
3. The population of wolves would decrease.
4. The population of deer would decrease.
If the population of flies around a pond increases, what might happen to the population of frogs?
1. The population of frogs would increase.
2. The population of frogs would decrease.
3. The population of frogs would not change.
4. The population of flies would decrease again, because frogs would eat them.
If the population of snakes around a pond increases, what might happen to the population of frogs?
1. The population of snakes would increase more, because they have lots of frogs to eat.
2. The population of frogs would increase.
3. The population of frogs would stay the same.
4. The population of frogs would decrease.
If the population of snakes around a pond decreases, what might happen to the population of frogs?
1. The population of frogs will decrease.
2. The population of frogs will stay the same.
3. The population of frogs will increase.
4. The snake population will increase.
Every food chain begins with __________________.
1. green plants
2. an animal
3. the sun
4. a producer
Where does almost all the energy on Earth come from?
1. Plants.
2. Wind.
3. Water.
4. The sun.
Food chains get their energy from _________________.
1. plants
2. the sun
3. producers
4. consumers
The parts of this food chain are not in the right order:
mouse - sun - grass seeds - hawk - snake
Which choice shows the right order for this food chain?
1. mouse - sun - snake - grass seeds - hawk
2. sun - grass seeds - snake - mouse - hawk
3. sun - grass seeds - mouse - snake - hawk
4. hawk - snake - mouse - grass seeds - sun
The parts of this food chain are not in the right order:
cow - person - grass - sun
Which choice shows the right order for this food chain?
1. cow - grass - person - milk - sun
2. grass - cow - person - milk - sun
3. sun - cow - person - milk - grass
4. sun - grass - cow - person
The parts of this food chain are not in the right order:
fox - rabbit - lettuce - sun
Which choice shows the right order for this food chain?
1. fox - lettuce - rabbit - sun
2. sun - lettuce - rabbit - fox
3. rabbit - fox - lettuce - sun
4. sun - fox - rabbit - lettuce
The parts of this food chain are not in the right order:
raccoon - frog - grasshopper - sun - grass
Which choice shows the right order for this food chain?
1. sun - grass - grasshopper - frog - raccoon
2. raccoon - frog - grasshopper - sun - grass
3. raccoon - frog - grasshopper - sun - grass
4. sun - raccoon - frog - grasshopper - grass
Changes in an ecosystem can be both good and bad. What are two good things that can happen from cutting down trees to build houses?
1. Animals will not have homes and people will.
2. We will have less oxygen because there are fewer trees, and animals will have no food.
3. People will have a place to live, and they can put food out for birds and squirrels in the winter.
4. People will lose their homes and so will the animals.
Changes in an ecosystem can be both good and bad. What are two bad things that can happen from cutting down trees to build houses?
1. Animals will not have homes and people will.
2. We will have less oxygen because there are fewer trees, and animals will have no food.
3. People will have a place to live, and they can put food out for birds and squirrels in the winter.
4. People will lose their homes and so will the animals.
What is a predator?
1. An animal.
2. A producer.
3. A consumer.
4. An animal that eats other animals.
What is the word for animals that are eaten by other animals?
1. prey
2. predator
3. consumer
4. producer
Which animal is a predator?
1. cat
2. rabbit
3. cow
4. earthworm
What do you call organisms that help break down wastes and dead things?
1. producers
2. consumers
3. decomposers
4. predators
What moves through a food chain or food web?
1. plants
2. energy
3. producers
4. predators
What's the difference between a food chain and a food web?
1. A food chain starts with the sun.
2. There is no energy in a food web.
3. A food web is a few food chains connected together.
4. A food chain is a few food webs connected together.