Changing Ecosystems TCI Lesson 3

Front

What evidence shows that living organisms affect non-living resources?

Back

A beaver’s behavior is evidence that living organisms affect non-living resources.

Front

What is an example of a gradual change in an ecosystem?

Back

A pond dries up over the course of a hundred years.

Front

How do prairie dog populations benefit other species?

Back

Prairie dog burrows provide safe shelter for snakes.

Front

What was the purpose of the straight channel dug from the Mississippi River to the Gulf?

Back

The straight channel diverted water away from a nearby community.

Front

What is a constraint to consider when building a river diversion?

Back

The river diversion cannot cause dangerous flooding.

Front

What role do beavers play in ecosystem changes?

Back

Beavers create dams that alter water flow and create new habitats.

Front

What is ecological succession?

Back

Ecological succession is the process by which ecosystems change and develop over time.

Front

What is the difference between primary and secondary succession?

Back

Primary succession occurs in lifeless areas, while secondary succession occurs in areas where a disturbance has destroyed an existing ecosystem.

Front

What are abiotic factors in an ecosystem?

Back

Abiotic factors are non-living components of an ecosystem, such as water, soil, and climate.

Front

How do human activities impact ecosystems?

Back

Human activities can lead to habitat destruction, pollution, and changes in species populations.