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4th grade chapter 5
Earth's Resources
Term | Definition |
---|---|
groundwater | any water that is underground |
sedimentary | rocks that form when layers of sediments settle on top of one another and harden |
weathering | process of rocks in Earth's crust slowly being broken into smaller pieces |
precipitation | any form of water that falls to Earth |
erosion | process of carrying away weathered bits of rock |
metamorphic | rocks that have changed as a result of heat and pressure |
watercycle | the movement of water from the Earth's surface to the atmosphere and back again |
land form | a natural land feature on Earth's surface |
fault | a break or crack in rocks where Earth's crust can move suddenly |
streak | color of the powder that a mineral leaves when it's scratched along a special plate |
mineral | natural nonliving solid crystals that make up rocks |
cleavage | properties of minerals to break along smooth flat surfaces |
luster | the way the surface of a mineral reflects light |
igneous | rocks that form from molten rock |
hardness | how easily the surface of a mineral can be scratched |