science 7th grade lesson 1, chapter 1

An avalanche is an example of which process?

• Weathering
• Erosion
• Deposition
• Volcanic Eruption

How does freezing water cause the weathering of rocks?  The freezing water—

• keeps the rocks in place.
• makes the rocks last longer.
• expands cracks and breaks rocks.
• causes rocks to fall in landslides.

The process that breaks down rocks and other materials on Earth's surface is called

• Weathering
• Erosion

What is the process that picks up and moves weathered rocks?

• Erosion
• Landslide
• Weathering

The process that breaks down rocks and other materials on Earth's surface is called

• weathering
• erosion
• soil conservation
• decomposition

What is mechanical weathering?

• Process through which rocks are physically broken into smaller pieces.
• Rocks are broken down through chemical changes.
• Rocks are worn away from acid in plant roots.
• Rocks broken down by machinery.

During chemical weathering, what can happen to the type of rock that has undergone chemical weathering?

• a new rock is produced that is larger than the original rock
• a new rock is produced that is the same as the original rock
• a new rock is produced that is different from the original rock 
• no new rock is created - it is just smaller in size

The diagrams  shows a natural process that weathers rock.
 Which statement best explains why this process results in weathering?

• frozen water acts as a solute
• water expands when it freezes
• the mass of water increases when it freezes
• frozen water dissolves most types of rock

chemical or mechanical process of breaking down rocks

• Weathering
• Exfoliation
• Frost wedging
• Soil

Process that occurs when water repeatedly freezes and thaws. 

• Residual soil
• Frost wedging
• Erosion
• Oxidation