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4gr Rocks

Rocks and Minerals Unit C

QuestionAnswer
Scientists who study the physical properties of rocks to tell how the rocks may have formed are called geologists
Rocks are made of naturally occurring substances called ______________ that are neither plants nor animals. minerals
Properties that can be used to tell minerals apart include the mineral's color, luster, streak, hardness
The property that refers to the way light bounces off a mineral is called luster
Rubbing minerals on a ________________ may leave a clue about the mineral. streak plate
A mineral that splits along flat surfaces in three directions is galena
Two examples of minerals that break unevenly are_______________ and talc. quartz
Rough-textured rocks have ______________ grains. large
Fine-textured rocks have _____________ grains. small
Rocks formed from hot, molten rock material that has cooled and hardened are called igneous
Magma is molten material ____________ the surface of the Earth. below
Magma that reaches Earth's surface is called lava
An example of an igneous rock with a fine texture is basalt
Deposited rock particles and other materials that settle in a liquid are called sediments
Four examples of sedimentary rock are rock salt, conglomerate, shale, limestone
Sediments are laid down in __________ order, with those at the bottom laid down first. time
Words like older, oldest, younger, and youngest describe relative age
Metamorphic rocks are rocks that have been changed by _________, ___________, or both. heat, pressure
Metamorphic rocks are classified into two groups: rocks with bands, and rocks without bands
Granite or shale heated under pressure can form gneiss
Rocks are changed from one type into another by a never-ending process called the rock cycle
Any trace, mark, or remains of an organism at least 10,000 years old usually preserved in sedimentary rock is called a fossil
Created by: lsadler
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