Ecosystems Unit Review

_______ factors include all nonliving things located within an ecosystem.

• community
• abiotic
• bitoic
• ecoystems 

Which is a freshwater ecosystem?

• lake
• estuary
• salt marsh
• ocean

An ecosystem contains ferns, rabbits, and many trees. Which BEST describes this ecosystem?

• aquatic ecosystem
• grassland ecosystem
• lake ecosystem
• forest ecosystem 

Which is a difference between abiotic and biotic factors?

• abiotic factors are plants and biotic factors are animals
• biotic factors are plants and abiotic factors are animals
• abiotic factors are all living things and biotic factors are all nonliving things
• abiotic factors are all nonliving things and biotic factors are all living things

Which best describes what makes one ecosystem different from another?

• the amount of sunlight, rainfall, temperature, and species types
• the amount of animals, oxygen, plant life, and pollution
• the amount of carbon dioxide, oxygen, water, and soil
• the amount of soil, water, buildings, and humans

Because of limited rainfall, few trees grow in the___________.

• Wetlands
• Grasslands
• Ocean
• Terrestrial Ecosystem

In which ecosystem would an organism that is adapted to daily changes in salinity (amount of salt) most likely be found?

• pond

• lake

• open ocean

• estuary

In which ecosystem will you most likely find bison, prairie dogs, and woody shrubs?

• grassland
• pond
• salt marsh
• forest

Which of the following is a producer in a pond ecosystem?

• bacteria
• fish
• algae
• turtle

Which of these ecosystems supports the widest variety of plants and
animals?

• desert
• estuary
• grassland
• tropical rain forest