Mechanical And Chemical Weathering: Explain and Elaborate

Open Ended

How was the whole created in this rock?

Multiple Choice

How do glaciers contribute to erosion?

• by creating strong winds across their surface

• 
  by dissolving compounds from rocks

• 
  by damming rivers and streams

• 
  by scraping sediment from the ground beneath them

Multiple Choice

Why is wind an agent of mechanical weathering?

• Wind carries sediment that causes abrasion of exposed rock, break it down over time.

  Correct (Selected)

• Wind carries oxygen molecules that react with iron in exposed rock.

  
  

• Wind carries water vapor that dissolves minerals in exposed rock.

  
  

• Wind carries acidic compounds that react with exposed rocks.

  
  

Multiple Choice

As tree roots grow and expand cracks in a rock, breaking the rock over time, is this an example of physical or chemical weathering?

• 
  chemical weathering

• 
  physical weatheringte

Multiple Choice

While hiking along a limestone cliff, a student discovers a small cave on the cliff's surface. What is the most likely explanation for this cave?

• 
  The passing of a recent glacier through the area caused an abrasion that tore limestone from the cliff, forming a cave.

• Acid rain falling on the cliff has dissolved calcite in the limestone, creating holes that have grown larger with time.

• 
  Exposure to air has caused iron-bearing minerals in the limestone to oxidize, creating holes that have grown larger with time.

• Snails and fungi living in tiny holes in the cliff have secreted chemicals that reacted with the limestone, gradually increasing the size of the holes to form a cave.