WorksheetsEcoHero Preview/Review
Total questions: 10
Worksheet time: 21mins
Name
Class
Date
1.
Which best explains how decomposers benefit an ecosystem?
a)
They increase dead organisms within the food chain.
b)
They create food for producers within the food chain.
c)
They break down dead organisms within the food chain.
d)
They supply consumers with food within the food chain.
2.
Which best describes the producers of an ecosystem?
a)
They provide food to herbivores.
b)
They provide food to decomposers.
c)
They provide hydrogen to the atmosphere.
d)
They provide carbon dioxide to the atmosphere.
3.
What would most likely happen if plant life was removed from a pond ecosystem?
a)
The level of the water in the pond would increase.
b)
The number of fish would decrease due to reduced oxygen.
c)
The amount of sunlight reaching the bottom would decrease.
d)
The number of fish would increase due to an increase in oxygen.
4.
The diagram below shows part of a river food web.
The amount of algae in a river increases over time. How will this most likely affect this food web?
The amount of algae in a river increases over time. How will this most likely affect this food web?
a)
There will be more trout for the bears to eat.
b)
There will be more sculpins for the snails to eat.
c)
There will be fewer clams for the raccoons to eat.
d)
There will be fewer minnows for the sculpins to eat.
5.
In a grassland ecosystem, lions prey on wildebeest. The population of lions has declined steadily because of illegal hunting. What will most likely happen to the population of wildebeest?
a)
The wildebeest population will increase.
b)
The wildebeest population will decrease.
c)
The wildebeest population will remain the same.
6.
Which is most similar to a grassland ecosystem?
a)
a lake
b)
a plain
c)
a forest
7.
Which best describes the role of litter in an ecosystem?
a)
Litter causes landfills to fill up more quickly.
b)
Litter is a pollutant that can harm living things in an ecosystem.
c)
Litter provides natural habitats for certain organisms in an ecosystem.
8.
Which statement best describes producers?
a)
Producers in water ecosystems are mainly algae.
b)
Producers in land ecosystems are mainly grasses.
c)
Producers in both water and land ecosystems are mainly trees.
d)
Producers in both water and land ecosystems are mainly green plants.
9.
Which best explains how a pond ecosystem is similar to a rainforest ecosystem?
a)
Both ecosystems contain large amounts of water.
b)
Both ecosystems are found in most parts of the world.
c)
Both ecosystems contain the same communities of organisms.
d)
Both ecosystems support food webs made up of producers and consumers.
10.
Some animals live in a grassland. A fire burns through the grassland. Which type of animal will best compete for resources after the fire?
a)
one that eats meat
b)
one that uses plants for shelter
c)
one that lives under the ground
d)
one that builds nests on the ground
100 %
