Identify the interactions as positive, negative, or both.

A mudslide wipes out the side of a thriving hill:

A volcano erupts, covering the nearby land with lava:

A forest is rapidly growing new plant life:

Humans remove wolves from a national park to protect surrounding homes:

A dam is built in the middle of a river ecosystem to supply water to a nearby town:

1. A mudslide wipes out the side of a thriving hill: This is negative as many trees and other organisms will get destroyed.

2. A volcano erupts, covering the nearby land with lava: This is negative as molten and extremely hot lava can cause serious damage to its surroundings.

3. A forest is rapidly growing new plant life: This is positive because new plants are being grown.

4. Humans remove wolves from a national park to protect surrounding homes: This is positive for humans because humans will be safe but it is negative for the eco system as removal of wolves can upset the eco system cycle.

5. A dam is built in the middle of a river ecosystem to supply water to a nearby town: This is positive for humans as a new water resource is being developed for humans but negative for aquatic organisms as the dam can hamper their ecosystem and can cause pollution in water.

negative

negative

positive

both

both