Rock Cycle - Rocks (6B)
 Lab 

PROBLEM: What is the difference between cementation and adhesion?

PREDICTION: 

PROCEDURE: Materials: plaster of Paris, spoon, water, mix bowl, concrete mix

Mix the following substances as listed on the graph below. After you mix each mixture, please clean your spoon and mixing bowl in a small tub of water. DO NOT CLEAN IN THE SINK. You will clog the drain because the cement will harden in water. Record your observations. You will need to finish your lab sheet after the concrete dries.

SPOONFULS

SUBSTANCE

WATER

(spoonfuls)

OBSERVATIONS

1

PLASTER OF PARIS

1

 

1

PLASTER OF PARIS

 

1

PLASTER OF PARIS

3/4

 

3

CONCRETE MIX

3

 

1

FLOUR

 

CONCLUSION: Which of the mixtures of plaster of Paris worked the best?

Summarize the difference between adhesives and cements.

 

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