how to classify rocks
TRANSCRIPT
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HOW TO CLASSIFY ROCKSBy Collette Phillips
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WELCOME TO HOW TO CLASSIFY ROCKS ! AT THE END OF THE LESSON. THERE WILL BE A SHORT QUIZ AND VIDEO. SO PAY ATTENTION! LET’S START!
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Sedimentary rocks
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Which one is a sedimentary rock? Look for rounded grains and how the rock layers are aligned.
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Which one is clastic? Which one is non-clastic?
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Hint: Clastic rocks are formed more by abrasion. Non-clastic rocks are made from chemicals
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Metamorphic rocks
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Which one is a metamorphic rock? Look for strong banding & orientation.
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Which one is foliated? Which one is non-foliated?
Hint: Foliated metamorphic rocks are banded together more. They get this way by different amounts of heat and pressure.
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Igneous rocks
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Which one is an igneous rock? Look for texture and small crystals.
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Which one is intrusive? Which one is extrusive?
Hint: Intrusive igneous rocks have larger minerals or crystals than extrusive igneous rocks
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VERY GOOD!! YOU LEARN FAST!!
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Now the QuizQ: What makes a sedimentary rock clastic? What makes it non clastic?
A: Clastic rocks are shaped by abrasion. Non-clastic rocks are made with chemicals.Q: What how can you tell the difference from a foliated metamorphic rock and a non-foliated rock? A: A foliated rock is banded together, while a non-foliated rock’s minerals it more spread out.Q: How can you tell a intrusive rock from an extrusive rock?
A: Intrusive igneous rocks have bigger minerals, because they were made inside the Earth. Extrusive rocks are have smaller minerals because they cooled fast outside the Earth’s crust.
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• http://www.youtube.com/watch?v=It5rl4dUXMk
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THE END (REMEMBER THE CLASSIFY METHOD)