Earth Final Exam Review pg 5-8

Cracks in rocks widen as water in them freezes and thaws.  How does this affect the surface of the Earth?

• It reduces the rates of soil formation.
• It changes the chemical composition of the rocks.
• It exposes rocks to increased rates of erosion and weathering.
• It limists the exposure of rocks to acid precipitation.

Which will most likely occur before a volcanic eruption?

• an increase in acid rain production
• an increase in mud flow
• an increase in earthquake activity

A mass movement that involves the sudden movement of a block of material along a flat, inclined surface is called a _______.

• slump
• flow
• slide
• rockfall

Water gets into the cracks of rock and freezes, causing the rock to break.  What is this an example of?

• erosion
• weathering

Using the soil triangle  what is 20 clay, 60 silt, 20 sand? 

• clay
• silt loam
• loam
• sandy loam

Which layer of soil is on the bottom?

• topsoil
• subsoil
• bedrock
• bottomsoil

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Movement of soil and rocks from one place to another is called...

• weathering 
• humus
• erosion

Breaking down or wearing away of rocks is called....

• weathering
• humus
• erosion 

The breakdown of rock into smaller pieces by physical means; common causes are ice, wind, water, gravity, plants, and animals

• Physical (Mechanical) Weathering 
• Chemical Weathering