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3 Types of Rocks Materials: Graham crackers marshmallow cream chocolate chips Starburst two packs microwave wax paper Magic School Bus Inside the Earth record sheet Lesson Notebook Discuss the fact that scientists like to categorize things. One Record: way they categorize rocks is by size, rocks, pebbles, sand, silt Sedimentary: layers – we discussed this in past weeks. Another way is by how Metamorphic: heat and they were made: pressure Metamorphic, sedimentary and igneous. Discuss what these Igneous: melting and are. cooling Make edible rocks: Edible Rocks Sedimentary – Layer graham crackers and marshmallow cream, choc. chips Can see layers, crumbly, can be broken apart Metamorphic Stack 3 different color starburst, press them together Warmth and pressure changes them to something different, not easily broken Igneous Melt chocolate in microwave, pour out onto wax paper on kids desks Watch it harden Often has crystals, bubbles and air inside caused by cooling. Read Magic School Bus Inside the Earth.
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