Bill Nye - Rivers and Streams

Rivers support a wide variety of life and are unique ecosystems. 

• True
• False

Humans do not normally build communities near river ecosystems.

• True
• False

Rivers tend to get deeper over time.

• True
• False

Riverbanks are changed due to erosion (wearing away).

• True
• False

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

• True
• False

Human pollution can ruin the river ecosystem.

• True
• False

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

Which of the following causes a river to change direction?

• Rills 
• Rocks 
• Ramps 
• All of the above

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

Why do fish lay eggs in shallow pools of gravel?

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