Subject: Science

Topic: The Rock Cycle

Grade Level: 4

Materials: Rock Cycle Diagram, Bubble Gum and "Pop Rocks" (one for each student).

Rocks and Minerals

A. Standards:

• Construct New Scientific and Personal Knowledge
• Reflect on the Nature, Adequacy, and Connections Across Scientific Knowledge
• Use Scientific Knowledge from the Physical Sciences in Real-World Contexts
• Use Scientific Knowledge from the Earth and Space Sciences in Real-World Contexts

B. Objective:

The learner will demonstrate a "Rock Cycle" by applying heat and pressure to gum and then by putting gum and "Pop Rocks" in their mouth.

C. Procedure

Take out a piece of bubble gum, hold it up and say "This represents a Sedimentary Rock."

·         Put it in your mouth and begin chewing it.

·         Ask the students, "What am I doing?" Of course they will say chewing gum.

·         Ask them to think scientifically and ask them, "What am I doing to the gum." questions:

1.    Is it cold inside my mouth, NO

2.    I am applying heat, YES

3.    What is happening when my teeth come down on the gum? I am applying pressure.

4.    So is the gum being changed? Yes

·         Pull the gum out of your mouth and place it on a clean dish.

·         Now open up a packet of "Pop Rocks" and pour some onto the gum.

·         Then kind of squeeze or fold them into the gum. Hold up the gum and say this represents an Igneous Rock.

·         place the gum (igneous rock) in your mouth and chew. Ask the students: What am I doing? Hopeful they will answer, applying heat and pressure.

·         Here pressure is more intense to crush the "Pop Rocks" (crystals).

·         Chew until all the "Pop Rocks" are mixed in as part of the gum.

·         Pull out the gum and say this represents a Metamorphic Rock. Tell students I have just shown you the "Rock Cycle".

·         Ask students if they would like to try it.

D. Activities

        Hand out one piece of bubble gum and one package of "Pop Rocks" for each student. Let students create their own "Rock Cycle". Now hand out a form that has the diagram of the rock cycle. Read over the cycle with students. Have a real example of each rock category for students to observe. At rock stations students will observe all three categories of rocks.

D. Explain:

Teacher will demonstrate the process of the rock cycle, using

bubble gum and "Pop Rocks". Then the teacher will read through the rock cycle with the students.

E. Elaborate:

During modeling, the teacher will ask for input from the students. What am I doing? What am I doing to the gum? Is it cold inside my mouth? Am I applying heat? Am I applying pressure? Is the gum being changed? Did it take more pressure to form the metamorphic rock than it did the igneous rock?

Students will create their own rock cycle with gum and "Pop Rocks". Teacher will circulate the room asking individual students the same questions used during checking for understanding. Teacher will guide students toward the questions they need to be answering.

 
F. Evaluate

Students will write about their experience of creating the rock cycle. Choose three students to share their thoughts. No assessment will be taken on this lesson. I will reflect on my own and with the students what was liked about the lesson and what was not liked.