During our look at Rocks and Minerals, we will be looking identifying the difference between the two. We will also be discussing the 3 types of rocks: Sedimentary, Igneous, and Metamorphic. By conductings experiements, we will be determining the characteristics of each type of rock. We will also discuss the uses of rocks and minerals.
metamorphic rocks-rocks formed when heat and pressure change one kind of rock into another.
sedimentary rocks- rocks formed over time by the hardening of layers of sediment like mud, shell particles, pieces of bone, and rock fragments.
igneous rocks- rocks that are formed when melted rock cools and hardens, either under or above the surface.
lava- molten rock found on top of Earth's crust
magma- molten rock underground
minerals- solid, pure substances found in the Earth that combine to form rocks. Minerals are made by a process deep within the Earth.
fossils-prints of plants and animals that lived long ago
gemstones- valuable minerals like diamonds, rubies and opals
rock cycle- the natural process by which rocks are created and changed to form new rocks
opaque- transmits no light
translucent- transmits varying degrees of light
transparent-transmits virtually all the light that is shined at them
hardness-the ability of a mineral to resist being scratched
luster-the shine of a mineral
intrusive- cools slowly, and creates coarse grained rocks
extrusive-cools quickly, and creates fine grained rocks
cleavage-the way a mineral breaks