An ecosystem where rivers/streams mix with ocean water is called ___________________.

What name is given to an ecosystem in which fresh water either covers the soil or is present at the soil surface for at least part of the year?

In a river/stream ecosystem, the water is typically fast moving, cold, nutrient poor, and clear near the ___________________.

Looking at the picture, what is the deepest part of the ocean that has no sunlight, low temperatures, and high water pressure?

Using the diagram, which zone starts at about 200m deep, and receives little to no sunlight and photosynthesis cannot occur?

Algae are organisms that can produce their own food through photosynthesis. Which zone would you expect to find them living?

Which is an example of a biotic factor in the marine ecosystem?

Organisms that drift with the current and serve as a major food source for aquatic animals are known as what?

The type of organims that you find in aquatic ecosystems depends on this factor of the water.

Eventually, dead and decaying organisms reach the _______________________, the bottom of a pond or lake, which is inhabited by decomposers, insect larvae, and clams

Sunlight is capable of reaching the deepest parts of the ocean.

The area of an aquatic ecosystem that is near shallow, near shore, & has an abundance of sunlight & wildlife

From the surface to the deepest, which is the correct position of the 3 zones of lakes and ponds?

The deepest part of a large lake; much colder and low in oxygen gas