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gr7Rocks

review for unit test

QuestionAnswer
What is a rock a mixture of two or more minerals
What is a mineral a pure, non-living, naturally occuring solid
What are the three rock families igneous, sedimentary and metamorphic
What kind of rocks are igneous fire rocks
What kind of rocks are sedimentary water rocks
What kind of rocks are metamorphic rocks that change form
What family do granite and basalt belong to igneous
What family do limestone and sandstone belong to sedimentary
What family do slate and marble belong to metamorphic
Two types of melted rock magma and lava
Intrusive rock igneous rock that forms from magma
Extrusive rock igneous rock that forms from lava
Which (magma or lava) forms larger crystals and why magma does because it takes longer to cool.
Sediments little pieces of rock like sand and gravel and mud
Beds layers of sediments
Compaction and cementation how sediments are turned into sedimentary rock
Geologic Time Scale the earth's history
How may eras have occurred in the Earth's history four eras
Radioactive dating a way scientists can tell the age of rock
parent rock the rock that a metamorphic rock comes from
How old is the oldest rock? 4.6 billion years
How many eras is the geologic time scale broken into? Four
How many minerals are there in the world? Over 3000
What are some properties that are used to tell minerals apart? Hardness, luster, streak, colour
Created by: devon science
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