Ecosystem Review

Which is a characteristic common to oceans and estuaries?

• contains only salt water

• contains only freshwater

• supports little to no animal life

• affected by the rise and fall of tides

How are estuaries and salt marshes similar?

• They both contain only freshwater.

• They are both larger than an ocean.

• They both have a variety of vegetation.

• They are both unaffected by the changing tides.

In which ecosystem can you find a mix of salt water and freshwater?

• estuaries

• lakes

• oceans

• ponds

Which is a main difference between a grassland and forest ecosystem?

• the amount of trees, as forests have more

• the amount of trees, as grasslands have more

• their location, as only forests are found in North America

• their location, as only grasslands are found in North America

Due to their fertile soil, grasslands and estuaries are being used for which purpose?

• agriculture

• fishing

• manufacturing

• tourism

How are grasslands and estuaries most alike?

• They both support marine life.

• They both have wide open areas.

• Lightning strikes easily start fires in both.

• Trees prevent growth of smaller plants in both.

Which explains the difference between a pond and an estuary?

• A pond is very shallow and an estuary is very deep.

• A pond contains no plants and an estuary contains plants.

• A pond is affected by tides and an estuary is not affected by tides.

• A pond contains freshwater and an estuary contains fresh and salt water.

A food chain is shown below. sun → grass → grasshopper → scorpion → kit fox → bacteria Which organisms are consumers?

• scorpion and bacteria

• grass and grasshopper

• grasshopper, scorpion, and kit fox

• grasshopper, scorpion, and bacteria

A biologist observed a zebra, a gazelle, and a prairie dog on an African grassland. Which term best describes the animals the biologist saw in the terrestrial ecosystem?

• carnivores

• consumers

• decomposers

• producers

How are bacteria classified in a forest ecosystem?

• as consumers

• as decomposers

• as herbivores

• as producers