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Minerals & Rocks
Using Earth's Resources
Question | Answer |
---|---|
Rock | Nonliving material made out of one or more minerals |
Sediment | Tiny bits of weathered rock or once-living animals or plants |
Igneous Rock | A rock forms when melted rock cools and hardens |
Minerals | Rocks are made of solid, nonliving materials |
Sedimentary Rock | A kind of rock that forms from layers of sediment |
Metamorphic Rock | A kind of rock that has been changed by heating and squeezing |
Lava forms rocks with | small mineral grains |
Lava flows | on the earth's surface |
Magma forms rocks with | large mineral grains |
Magma is | inside the earth |
Luster | Describes how light bounces off a mineral |
Streak | The color of the powder left when a mineral is rubbed across a white tile |
Hardness | How easily a mineral can be scratched |
Color | Most minerals come in just one color (quartz comes in many colors) |