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Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Why are the first minerals to crystalize the last to melt when the rock is heated? | Because it takes such a high temperature to be melted as soon as it cools it crystalizes inside it doesnt take as high of temperature to stay molten
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| What is the diffrence between extrusive and in trusive rocks? | Extrusive-fine grained, cool quickly on earths surface
Intrusive-coarse grained, cool slowly, beneath earths surface
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| How do temperature and pressure change as a mass of magam moves upward through the Earths crust? | Temperature and pressure decrease
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| What are 3 ways magma is classified? | Basaltic-least amount of silica
Andesitic
rhyolitic-most silica
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| What is the classification of magma based on? | amount of silica it contains
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| Why are there diffrent types of an igneous rock | diffrent grain sizes
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| What is fractional crystalization | when magma cools diffirent minerals form at diffrent temperatures
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| what determines texture? | rate of cooling determines shape of grains which is texture
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| How do you check texture? | BY making thin slice and looking under a microscope
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| State 1 reason why igneous rocks are resources? | minerals found in in them are resistant to weathering
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| what is most common igneous rock? | granite
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| what is magma made of (3 things)? | molten rock, gases, mineral crystals
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| how does silica affect magma(2 things) | 1. melting temp 2. quickly magma flows
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| HOw are Igneous rocks classified? | extrusive and intrusive
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| What so felsic rocks look like? | light colored, high silica content, contains quartz
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| what do mafic rocks look like? | dark colored, lower silica content, and rich in iron and magnesium
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| Do felsic or mafic rocks have higher silica content? | felsic
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| what size crystals form when magma cools slowly? | large
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| what size crystals form when lava flows quickly? | small
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Created by:
Ali7832
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