Vocab 1
the color of a mineral's powder
streak
dark colored rock found in the ocean
basalt
give an example word to describe a rock's texture
smooth, coarse, glassy, chalky
What is the hardest mineral ranked on the Mohs Hardness Scale?
diamond-10
What are rocks made of?
mixtures of minerals and other materials
how shiny a mineral is
luster
light colored rock found in Earth's crust
granite
fine-grained
grains are small and can only be seen with a microscope
What test determines mineral hardness?
scratch test
Scientists group a rock's grains into what 3 groups?
size, shape, and pattern
how easily a mineral can split easily along flat surfaces.
cleavage
the small particles that makeup a rock's texture
grains
coarse-grained
grains large and easy to see
No matter what the size of a mineral sample, the ______ of that mineral always remains the same
density
rock that forms when particles of plants and animals are pressed and cemented together
sedimentary rock
Not made from living things
inorganic
most common minerals that make up the crust
rock-forming minerals
What are the three groups of rocks?
igenous, metamorphic, sedimentary
What tool do you need to identify a mineral's crystal structure?
microscope
rock formed from the cooling of magma or lava
igenous rock
particles arranged in a repeating pattern
crystal structure
the look and feel of a rock's surface
texture
why do you need to look at the inside of a rock to identify it?
because the effects of ice, liquid water, and weather can change the outer surface of a rock
What 5 things must a rock be inorer to be consiered a mineral?
solid, naturally occuring, inorganic, crystal structure, with a definite chemical composition
rock that forms when an existing rock is changed by heat, pressure, or chemical reaction
metamorphic rock