Unit 6 Test Earths Surface

When two ore more pieces of Earth's crust push together, they from a(n) _____________. 

• canyon 
• mountain
• volcano
• weathering

When a river flows over time, it can leave a deep groove with tall sides called a(n) _____________. 

• mountain
• canyon
• volcano
• erosion

Lava can ooze or erupt quickly from a _____________. 

• volcano
• erosion
• canyon
• mountain 

A landslide on the side of a mountain is rapid _____________. 

• volcano
• erosion
• weathering
• earthquake

A rock breaks apart after freezing and thawing many times. This is an example of __________. 

• weathering
• erosion
• volcanic eruption
• canyon

Jordan describes a landform as flat land that spreads out over a long distance. Identify the landform and compare it to a mountain. 

• Valley; A mountain is tall. A valley is a low area with sloping sides. 
• valley; A mountain is tall and often has jagged peaks. Valleys are shorter. 
• plain; A mountain is tall and has a peak. Plains are flat and are not tall
• plain; A mountain is tall with steep sides. A plain is low with steep sides.

Which of these is a sudden change in Earth's surface that can be harmful to living things?

• erosion
• a forest fire
• a glacier
• weathering

Over many years, a mountain is weathered and eroded. What landform will the mountain gradually change into? 

• a canyon
• a hill
• a volcano
• a valley

On which layer of Earth do you find oceans, mountains, and valleys?

• crust
• inner core
• mantle
• outer core

John's class is visiting a delta to make observations. The students observe rich soil. What is the most likely reason for this? 

• Rocks in the delta were ground into soil. 
• The soil was carried into the delta by the wind. 
• Weathered rock was washed into the delta by a flowing river. 
• Rocks from the ocean were ground up by ocean waves.