Ecosystems and Environments

A researcher collects data for the average monthly rainfall and temperatures of two ecosystems for three months in a table.

The researcher finds that the soil of Ecosystem 1 is more fertile than the soil in Ecosystem 2. From which two ecosystems did the researcher likely collect the data?

• Ecosystem 1: forest; Ecosystem 2: grassland

• Ecosystem 1: grassland; Ecosystem 2: forest

• Ecosystem 1: grassland; Ecosystem 2: ocean

• Ecosystem 1: forest; Ecosystem 2: ocean

Which ecosystem would be best classified as a terrestrial ecosystem?

• estuary

• forest

• lake

• marsh

Which feature of a pond ecosystem makes it different from an estuary ecosystem?

• The pond has only salt water

• The pond has only freshwater

• Only a pond has animals with webbed feet.

• Only a pond has water with different temperatures at different depths.

The chart lists information about a water-based ecosystem.

What conclusion can be made about the ecosystem described in the chart?

• It is an ocean.

• It is an estuary.

• It is a lake.

• It is a pond.

Dust particles

• abiotic

• biotic

microorganism cells

• biotic

• abiotic

salt crystals

• abiotic

• biotic

sawdust

• biotic

• abiotic

Which aquatic organism would most likely be found living in a freshwater ecosystem?

• coral

• frog

• starfish

• stingray

Which statement is true about ocean ecosystems?

• Oceans are large bodies of freshwater.

• The temperature of ocean water usually stays the same from the top to the bottom.

• Oceans are small bodies of water surrounded by land.

• Most organisms in an ocean live closer to the surface or where the water is shallow.