1.  How do ecosystems change? Lesson 1 Chapter 6

2. Animals Change Ecosystems  Locusts- feed on all the plants in their way  Beavers- make ponds by damming streams  Earthworms- dig holes through soil to bring oxygen to plants roots.

3. People Change Ecosystems  Build Houses  Throw out garbage  Clear Forrests

4. How plants change the ecosystem  People bring plants with them when they move  When a specie of plant is brought into and ecosystem it could harm the plants that are already there.

5. Garlic Mustard Plant  Used for food and medicine  Not eaten by animals  Takes over forest floor

6. Zebra Muscles  Animal moved because it stuck to bottom of ships  No predator to control population  Grows fast  Takes space and food needed by other animals  Other animals may die

7. Landfills  America makes 1.8 kilogtams of garbage a day  200million tons a year.  Pile of garbage eventually covered with soil and grass.

8. Acid Rain  Rain that has absorbed pollution  Pollutes lakes and soils.  Plants and animals can die