Category 1
A person who studies rocks and minerals
What is a geologist
the repeating pattern of a mineral having flat sides that meet in sharp edges and corners
What is crystal
rocks formed from magma, or lava, that has cooled and hardened
What is igneous rocks
solid material made from minerals that form the earth’s crust
What is rocks
the continuous changing of rocks from one form to another over long periods of time
What is rock cycle
new rock formed from existing rock that is changed by heat and pressure inside the earth
What is metamorphic rocks
bits of weathered rocks and minerals, pieces of dead plants and animals, sand and silt
what is sediment
rocks formed from compacted sediment
what is sedimentary rocks
materials displaying a definite chemical formula and shape, form in the ground from one or more chemicals
What is minerals
Involving neither organic life nor the products created from or by organic life.
What is inorganic
Name the three types of rocks
What is Igneous, Sedimentary Metamorphic
rock formed from once living organisms
What is organic rocks
remains of living organisms found in sedimentary rocks which lets scientists learn about existing life from the past
What is fossils
digging or extracting minerals from the earth
What is mining
a chemical substance composed of many identical molecules containing atoms from more than one chemical element held together by chemical bonds.
What is chemical compound
source of fluorine in toothpaste and fluoride in water
What is fluorite
pressed organic matter, major fuel source here in Illinois
What is coal
A mineral's luster is the overall sheen of its surface.
What is luster
a measure of its relative resistance to scratching
What is hardness
a chemical substance composed of many identical molecules containing atoms from more than one chemical element held together by chemical bonds.
What is cleavage
the texture and shape of a rock's surface formed when a mineral is fractured.
What is fracture
the color of a mineral in its powdered form. It is usually obtained by rubbing the mineral on a hard, white surface, such as a tile of unglazed porcelain, so as to yield a line, or streak, of fine powder.
What is streak
It is the density of a substance relative to water
What is specific gravity
the minerals containing silicon and oxygen in tetrahedral SiO44- units, which are linked together in several patterns.
What is silicates
contains iron but has very little economic use in the U.S. “fools gold”
What is pyrite