Rocks

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  • Created by: amypower
  • Created on: 23-06-15 12:10
What are rocks made of?
Rocks are made of grains that fit together. Each grain in the rock is made from a mineral, which is a chemical compound.
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What are the different types of grains with example?
Interlocking Grains - Granite Rounded Grains - Sandstone
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What are rocks that can absorb water called?
Porous Rocks and they are usually rounded grains
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Name the three main types of rocks?
Sedimentery, Igneous and Metamorphic
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What is the order of processes of the formation of a sedimentery rock?
sedimentation → compaction → cementation
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Describe a sedimentery rock?
They contain rouunded grains such as mud and sand. They have layers and sometimes fossils can be trapped within.
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In a sedimentery rock where are the oldest layers?
The oldest layers are at the bottom. (newest at the top)
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Describe a metamoprhic rock?
They have been morphed from a different type of rock. Contain thin layers. Very hard and rarely have fossils.
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What types of rocks can metamorphic rocks be before they have changed?
Igneous or sedimentery
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What 2 conditions are needed to form a metamorphic rock?
Heat and Pressure
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What causes rocks to become heated?
Magma
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Marble is formed from what rock?
Limestone
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Why do you think metamorphic rock is harder?
It has been heated and pressurized
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Why on't you often find fossils in metamorphic rocks?
The heat has melted them
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Describe an igneous rock?
Contains randomly interlocking crystals which can vary in size. Do not contain fossils and are formed when the magma solidfies.
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What are the 2 types of igneous rock?
Intrusive and Extrusive
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What is the defintion of intrusive and extrusive?
Intrusive- Have large crystals because they have cooled slowly Extrusive - Have small crystlas because they have cooled quickly
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What igneous rock has been cooled on the surface of the earth?
Extrusive
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Give an example of each rock?
Sedimentery- Limestone/sandstone Metamorphic - Slate/Marble Igneous - Pumice/granite
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Other cards in this set

Card 2

Front

What are the different types of grains with example?

Back

Interlocking Grains - Granite Rounded Grains - Sandstone

Card 3

Front

What are rocks that can absorb water called?

Back

Preview of the front of card 3

Card 4

Front

Name the three main types of rocks?

Back

Preview of the front of card 4

Card 5

Front

What is the order of processes of the formation of a sedimentery rock?

Back

Preview of the front of card 5
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