Front

Rivers support a wide variety of life and are unique ecosystems. True or False?

Back

True

Front

Humans do not normally build communities near river ecosystems.

Back

False

Front

Do rivers tend to get deeper over time?

Back

False

Front

Riverbanks are changed due to erosion (wearing away).

Back

True

Front

Water flows over a shelf of hard and soft rock to form waterfalls.

Back

True

Front

Human pollution can ruin the river ecosystem.

Back

True

Front

Which of the following correctly describes how water flows? Rills to streams to rivers to oceans, Oceans to rivers to rills to streams, Rivers to rills to oceans, Rivers to streams to oceans

Back

Rills to streams to rivers to oceans

Front

Which of the following causes a river to change direction? Rills, Rocks, Ramps, All of the above

Back

Rocks

Front

Which of the following is true about churning water? Oxygen mixes with water, which is good for fish. Churning water can wash fish eggs downstream. Both A and B, Neither A nor B

Back

Both A and B

Front

Why do fish lay eggs in shallow pools of gravel?

Back

To protect them from flowing, churning water; So they will stick in the cracks of rocks; To keep them from washing downstream.