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Ch. 3 Rocks
| Question | Answer |
|---|---|
| What are rocks? | are any solid mass of mineral or mineral-like matter that occurs naturally as part of our planet |
| What are the three major types of rocks? | they are igneous, metamorphic, and sedimentary |
| What cycle is the cycle that rocks go through that changes them to one type of rock to another? | it is the rock cycle |
| How do igneous rocks form? | they form from lava or magma that hardens |
| What are intrusive igneous rocks? | they are rocks that form when Magma hardens( in the ground) |
| What sre extrusive igneous rocks? | they are rocks that form when Lava hardens( on the surface) |
| What three proccesses happen to sedimentary rocks? | the processes that occur are weathering, erosion, and deposition |
| Where was a sedimentary rock formed if it has ripple marks? | It was formed in water. |
| What are the agents of metamorphism? | the agents are heat,pressure(stress), and reactions in solution |
| what are the two classifications of a metamorphic rock? | they two classifications are foliated abd nonfoliated |
| What is a corase-grained texture? | It's texture that shows slow cooling results in the formation of large crystals. |
| What is fine-grained texture? | It's texture that shows rapid cooling of magma or lava that results in rocks with samll, interconnected mineral grains. |
| What is a porphyritic texture? | It's a texture that contains a large body of magma that has been harden over the thousand years. |
| What is a granitic composition? | Igneous rocks in which these are the main minerals are said to have a granitic compositon. |
| What is a basaltic composition? | Rocks that contain many dark silicate minerals and plagioclase feldspar. |
| What is compactation? | It's a process that squezzes, or compacts, sediments. |
| What is cementation? | It takes place when dissolved minerals are deposited in the tiny spaces among the sediments. |
| What are clastic sedimentary rocks? | They are rocks that are made of weathered bits of rocks and minerals |
| What are chemical sedimentary rocks? | They are rocks that are dissolved minerals when they precipitate from water solutions. |
| How are sedimentary rocks useful? | The many unique feautures of sedimentary rocks are clues to how, when, and where the rocks formed |
Created by:
fnre
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