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Rockin' rocks
Rock on
100
Magma that reaches the earth's surface.
What is lava?
100
A mixture of minerls, rock fragments, volcanic glass, organic matter or other materials.
What is a rock?
100
The rock cycle.
What is the process that creates and changes rocks?
200
Molten rock that does not reach the earth's surface.
What is magma?
200
The rock that forms when lava cools and hardens.
What is an igneous rock?
200
When mineral grains line up in parallel layers.
What is foliated?
300
Rocks formed by magma below the surface.
What are intrusive rocks?
300
A rock that is light colored,has a lower density and lots of silica.
What is granitic rock?
300
Rocks formed by sediments being pressed or cemented together, or by solutions.
What is sedimentary rock?
400
Rock fragments, mineral grains,and bits of shells moved by wind, water, ice or gravity.
What are sediments?
400
Rock that is formed when lava cools on the surface.
What is extrusive rock?
400
The process of small sediments sticking together.
What is compaction?
500
Rocks that have changed because of pressure, temperature or hot fluids.
What are metamorphic rocks?
500
A rock that is dark colored, and rich in iron and magnesium.
What is basaltic rock?
500
Cementation
What is the process in which natural cements hold sediment grains together?