# Rock Cycle Lab - DOC by v6XTCxT7

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```									                                           Rock Cycle Crayon Lab
_________
Name ___________________________________________________________ Period __________                          20
Purpose: To observe the rock cycle through a series of simulation activities.
Materials: 2 (or more) crayons of different colors per group, penny, paper towel, aluminum foil, aluminum pie tin,
3 cups (one with ice water, one with warm water, and one empty), ice, alcohol burners, rings stands, text books.
Procedure & Data:
1. Using the penny, weather (shave) your crayon onto the paper towel.
 Describe AND Draw the crayon after weathering:

2. Now, erode (move) and deposit your weathered crayon onto a piece of aluminum foil in a neat pile. Make
sure to leave some shavings on the paper towel to be used later in step 5.
 Describe AND Draw the weathered crayon:

3. Carefully fold the loose layers of crayon shavings inside the aluminum foil. Compact and cement the
layers by placing a textbook on top of the folded aluminum foil. Then remove the text book and unwrap
the aluminum foil. Remove a piece of the crayon and set it aside.
What kind of rock does the crayon represent? ___________________________________________
 Describe AND Draw the crayon after compaction and cementation:

4. Rewrap the tin foil and place the textbook back on top of it. This time push down on the text book with as
much pressure as you can. Then raise your hand to have your teacher light your alcohol burner. Hold
the foil packet over the alcohol burner for ONLY 5 seconds. Set the foil packet down and place a
textbook on it and let the foil packet cool under the text book. After it is cool remove the textbook, unwrap
the foil and remove a piece of the crayon and set it aside.
What kind of rock does the crayon now represent? _________________________________________
 Describe AND Draw the crayon after intense heat and pressure:

5. Put the remainder of the crayon shavings onto the aluminum pie tin. Heat the pie pan over the alcohol
burner until the crayon shavings are melted. Don’t let them smoke too much – it will make the room smell
really bad! Pour a little bit of melted crayon into the 3 different cups. One with ice water, one with warm
water and one without water. Let the crayon cool for a few minutes.
What kind of rock does the cooling crayon represent? ______________________________________________
 Describe AND Draw the melted and cooled crayon:
o Ice water crayon –

o Warm water crayon –

o No water crayon –
Analysis:
1. When you weather the crayon, were the shavings the same size or shape as before? Why?

2. What was the weathering agent in the lab? What are 3 different weathering agents in nature?

3. How do rock sediments erode (move) in nature?

4. Where are rock sediments usually deposited in nature?

5. How are rock sediments put together to form a sedimentary rock?

6. What was the difference between making a sedimentary rock and making a metamorphic rock?

7. How do the different temperatures of water represent the different types of igneous rocks?

8. How are the different igneous rock samples the same? How are they different

9. Fill out the table below using what you learned from the lab.
Rock Type               3 Characteristics               Formation                 Drawing

Sedimentary

Metamorphic

Igneous

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