| Just below Mount St. Helen |
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 | The volcano is about to blow! Rocks will form and the Rock Cycle will begin. Our work here is done. | |
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| I wonder who came up with the names of the rocks...Sedimentary, Igneous, Metamorphic? We really should go! | |
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| Without the Earth, we wouldn't have rocks and minerals. We use rocks to build things. We use minerals in our foods and to make things. We need them in our daily lives. | |
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| I could have filmed this on Earth. (SIGH) | |
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| Back in Rome at the Colosseum |
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| So a rock is made of one or more minerals, and a mineral is a solid thing found in nature. According to this, the Mohs Scale helps us identify minerals. | |
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| That is correct. Without rocks and minerals we wouldn't be able to enjoy this piece of history. We have done enough. How about some water? | |
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