There are two main types of aquatic ecosystems, marine and freshwater.

An ecosystem is made up of

A habitat is

Community is

A population is a certain specific animal in the community

Can populations adapt over time?

Do relationships exist between plants and animals in an ecosystem?

A physical adaptation in an animal is a type of change to a part of the animal body that helps them survive. Examples of these are webbed feet, large beaks, feathers, furs, and sharp claws.

A behavioral adaptation is something an animal does - how it acts. Some examples of behavioral adaptations are how an animal moves, what they are able to eat, how they can protect themselves. Which of the following is not a behavioral adaptation.

The difference between a swamp and a marshland is that the swamps have trees.

A type of marine (salt water) ecosystem that contains most of all the water on earth is a

A body of water that has a natural flow of moving water, it is smaller than a river, and has a detectable current is called a

In this type of aquatic ecosystem the sunlight can reach the bottom (on most) and it is smaller than a lake.

I am a type of water ecosystem and can be either salty or fresh. I form in low-lying areas near rivers and sea coasts. I cannot support trees. What am I?

I am a flowing, moving, stream of water. I usually feed into an ocean, lake, pond, or other rivers. I act as a drainage channel for surface water. I start at the highest poing in an area and flow downstream. What am I?

A natural resource is any material that is found in nature.

Conservation is the protection of things found in nature. Conservation is important because it helps to preserve natural resources so they will be around in the future. Select all the answers below that show examples of conservation.