Lesson 6.1

Which of these can help stop erosion

• trees

• eathquakes

Which changes can be stopped by plants?

• a drought

• erosion

Which can make erosion happen faster?

• plant trees

• cut down trees

Look at the picture?

How fast does this event change the Earth's surface

• Earth's surface changes slowly.

• Earth's surface changes quickly.

Which change takes a long time?

• 
• 
• 

Rain causes rivers to overflow. What is this called?

• drought

• flood

Wind and water break up large rocks into smaller ones. What is this called?

• erosion

• weathering

There has been no rain.

• flood

• drought

Moving water changes land by carrying rocks and soil

• erosion

• weathering

What made the sand dunes look this way?

• erosion

• flooding