Aquatic Ecosystems (H)

Front

What is the term for land-based habitats?

Back

Terrestrial

Front

Which of the following is NOT a freshwater ecosystem? (ponds, estuaries, lakes, rivers)

Back

Estuaries

Front

Why do most ocean organisms live near the surface?

Back

Because that is where the majority of the oxygen and sunlight occurs.

Front

What percentage of the Earth's surface is covered with water?

Back

75%.

Front

What is the level of the ocean where no light penetrates?

Back

Aphotic zone.

Front

What is an aquatic ecosystem?

Back

A water-based environment that supports a community of organisms.

Front

What are the two main types of aquatic ecosystems?

Back

Freshwater and marine.

Front

What is a freshwater ecosystem?

Back

An ecosystem that contains low concentrations of salt, such as lakes, rivers, and ponds.

Front

What is a marine ecosystem?

Back

An ecosystem that includes saltwater environments, such as oceans and coral reefs.

Front

What is the photic zone?

Back

The upper layer of a body of water that receives enough sunlight for photosynthesis.