____ ecosystems include streams, rivers, ponds, and lakes.

A(n) _________ is found where the fresh water of a river meets the salt water of an ocean.

Located on the shore, the ________ zone is home to organisms that can survive pounding waves and sudden changes in water levels and temperatures.

There are two types of aquatic ecosystems: freshwater biomes and ______ biomes.

Organisms like the giant squid and anglerfish are adapted to life in the dark of the _____ zone.

All ________ are affected by the same nonliving factors: sunlight, temperature, oxygen, and salt content.

Most of Earth's surface is covered with water, yet only ____ is fresh water.

Usually lakes are larger and deeper than ____ .

Tuna, swordfish, and some whales feed on algae in the _____ zone.

The _____ is a region of shallow water where many living things, such as algae and schools of fish live.

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