1. ECOSYSTEMS

2. Living things
+ Nonliving things
ECOSYSTEM

3. Living things in an ecosystem are called a…
COMMUNITY

4. Population
+ Population
COMMUNITY

5. All energy in a food web comes from the…
SUN

6. What makes ecosystems different?
Amount of water 1
Amount of sunlight 2 3
Type of soil

7. Name the three members in every community.
Producers
Consumers
Decomposers

8. What causes ecosystems to change?
Natural causes: 1
Drought
Disease 2 3
Fire 4
Overpopulation

9. What causes ecosystems to change? Changes caused by humans:1
Water pollution 2
Air pollution 3
Land pollution 4
Construction

10. How can humans help to prevent changes in ecosystems?1
Use resources wisely 2
Laws that control pollution 3
Clean up litter 4
Keep rivers and lakes clean