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Science
volcanoes
Term | Definition |
---|---|
topography | the shape of the surface features |
bathymetry | the shape of land that is covered by water |
elevation | how high or low a place is |
relief | how quickly the elevation changes from point A to point B; stated in terms of high or low |
mineral | a naturally occurring, inorganic solid with a crystal structure, and unique chemical composition |
rock | naturally occurring solid |
igneous | forms from cooling magma or lava |
sedimentary | forms from sediment |
metamorphic | forms from other rocks that have been changed |
natural resources | naturally produces materials that are useful to us because of their physical or chemical properties |
obes | material mined for profit |
fossil fuels | naturally occurring objects that came from the remains of once living; give off energy when burned |
color | simple observation; not very useful |
luster | description of the way it reflects light; metallic or non-metallic |
density | mass divided by volume |
hardness | comparison of the unknown mineral to objects with a known hardness(Mohs' scale) |
streak | the color of the powder of a mineral |
cleavage | break on parallel lines |
fracture | break in irregular, non-repeated shapes |
diamond | hardest known material |
talc | softest known material |