Lesson today on Rocks and Minerals.
Rocks
Igneous - formed from fire
Sedimentary - formed in layers
Metamorphic - formed from pressure
Rocks are mixtures and have no definite chemical composition
Rocks are made up of minerals
Minerals
Minerals are pure substances and are made up of elements
Minerals have chemical formulas, which means they form in definite ratios
Minerals form crystals
You can use the Mohs Hardness scale and a streak test to identify a mineral
Samples to show.
Great to use the Smart Board!
We had 8 different samples for the students to identify. The students labeled their boxes and picked out their samples.
The finished box with warning label: Keep away from small children. Do not place rocks and minerals in your mouth!
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