First we took a look with our magnifying glasses to discover the properties of three specific rocks: scoria, tuff and basalt.
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| These rocks are light. |
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| These rocks are different colors. |
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| These rocks are bumpy. |
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| These rocks are rough. |
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| This rock is smooth. |
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| Learning new words. |
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| These rocks are small. |
Next we started writing up the experiment:
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| What happens when you rub rocks together? |
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| My hypothesis is... |
Finally we experimented:
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| Look! Rock dust! |
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| The scoria created the most rock dust. |
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| The basalt left marks. |
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| Many students thought that sparks might fly. |
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| The rocks were soft. |
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| The rocks were hard enough to leave marks. |
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| Let's look at the rock dust. |
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| Some dust was big. |
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| Some dust was very small. |
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