Erosion Lab: Chalk

There are a number of different sources of erosion.

Chalk is actually a piece of sedimentary rock: limestone.  Therefore, it is subject to the same types of erosion as any other rock.  Sedimentary rock is more susceptable to erosion than other types of rock because it is usually newer and is less dense than metamorphic and igneous rocks.

Data:

Directions/Suggestions- Describe as best you can the appearance of your piece of chalk.  Is it smooth or rough?  How much does it weigh?  What color is it before and after being exposed to “the elements”?

Describe a typical piece of chalk.
 
 
 
 

Describe your piece of chalk after being placed in hot water for 20
minutes.

Original weight of chalk:  ________grams

Final weight of chalk:  ________grams
 
 
 
 
 

Describe your piece of chalk after being placed in cold water for 20 minutes.

Original weight of chalk:  ________grams

Final weight of chalk:  ________grams
 
 
 
 
 
 

Describe your piece of chalk after being placed in hot vinegar for 20 minutes.

Original weight of chalk:  ________grams

Final weight of chalk:  ________grams
 
 
 
 
 
 

Describe your piece of chalk after being placed in cold vinegar for 20 minutes.

Original weight of chalk:  ________grams

Final weight of chalk:  ________grams
 
 
 
 
 
 

Post Lab:

How do these activities simulate erosion?
 
 
 
 

Why is it important to study erosion?
 
 
 
 
 

Where can you find examples of erosion in the world?
 
 
 
 
 
 
 


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