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Science Vocab Ch. 8

Rocks; Lessons 1 - 4

TermDefinition
Rock A ... is a natural, solid mixture of minerals or grains.
Grain Geologists call the fragments that make up a rock ...
Texture The grain size and the way grains fit together in a rock are called ...
Magma You might remember that when ..., molten or liquid rock underground, cools, mineral crystals form.
Lava Molten rock that erupts on Earth's surface is called ...
Sediment ... is rock material that forms where rocks are broken down into smaller pieces or dissolved in water as rocks erode.
Rock Cycle The series of processes that change one type of rock into another type of rock is called the ...
Extrusive Rock When volcanic material erupts and cools and crystallizes on Earth's surface, it forms a type of igneous rock called ...
Volcanic Glass ... is rock that forms when lava cools too quickly to forms crystals, such as the obsidian shown in Figure 8.
Intrusive Rock Igneous rocks that form as magma cools underground are called ...
Compaction The weight from the layers of sediment forces out fluids and decreases the space between grains during a process called ...
Cementation When minerals dissolved in water crystallize between sediment grains, the process is called ...
Clastic Rock Sedimentary rocks that are made up of broken pieces of minerals and rock fragments are known as ...
Clast The broken pieces and fragments are called ...
Chemical Rock ... form when minerals crystallize directly from water.
Biochemical Rock ... is a sedimentary rock that was formed by organisms or contains the remains of organisms.
Metamorphism ... is any process that affects the structure or composition of a rock in a solid state as a result of changes in temperature, pressure, or the addition of chemical fluids.
Plastic Deformation This permanent change in shape by bending and folding is called ...
Foliated Rock ... contain parallel layers of flat and elongated minerals.
Nonfoliated Rock Metamorphic rocks that have mineral grains with a random, interlocking texture are ...
Contact Metamorphism During ..., magma comes in contact with existing rock, and its thermal energy and gases interact with the surrounding rock and forms new metamorphic rock.
Regional Metamorphism ... is the formation of metamorphic rock bodies that are hundreds of square kilometers in size.
Created by: stemljos4017