Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
The Rock Cycle
100
What are rocks made of?
Minerals
100
How do igneous rocks form?
Lava or magma cooling
100
How do sedimentary rocks form?
Sediments build up and over time they compact together.
100
How do metamorphic rocks form?
Heat and pressure changes an existing rock.
100
How could a sedimentary rock turn into a metamorphic rock?
Heat and pressure
200
What is the name for a scientist that studies rocks?
Geologist
200
An igneous rock that forms from magma is called ??????
Intrusive
200
What term describes the process of wind or water loosening and carrying away sediment?
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Erosion
200
Metamorphic rocks that have grains formed into layers or bands are said to be ????
Foliated
200
How could an igneous rock turn into a sedimentary rock?
Erosion, deposition, compaction, cementation
300
When studying a rock sample, geologists observe the color and ????? to determine it's mineral composition.
Texture
300
An igneous rock that forms from lava is called ??????
Extrusive
300
What term describes the process of sediments being put down in layers at the bottom of a body of water?
Deposition
300
Metamorphic rocks that have grains arranged randomly are said to be????
Non-foliated
300
How can an igneous rock turn into a metamorphic rock?
Heat and pressure
400
The texture of a rock depends on it's ?????
Grains
400
What is the name of this rock, also called volcanic glass?
Obsidian
400
What term describes the process of sediments getting pressed together tightly?
Compaction
400
Marble is one of the most common metamorphic rocks. What is it used for?
Building materials, statues, furnishings
400
How could a sedimentary rock turn into an igneous rock?
Melting, volcanic activity
500
Rocks that have small grains are said to be fine-grained. What do we call rocks with large grains?
Coarse-grained
500
Granite is one of the most common igneous rocks, what is it's main use?
Building material
500
Describe the process of cementation of sediments.
Dissolved minerals crystallize and glue sediments together.
500
What rock turns into quartzite after being changed by heat and pressure?
Sandstone
500
Describe what a "cycle" is.
A series of events that are regularly repeated.