Name: ______Period: ______
Rocks pp.304-311
A rock is ______
Geologists use the mineral’s grains size, shape and composition to ______.
Types of Rock
Igneous - made when magma or lava ______
Magma is melted rock that’s ______, above ground it’s called ______
Sedimentary - made where sediment is ______
sediment - rocks broken into ______
Metamorphic - made when any ______, ______or even another metamorphic rock is exposed to extreme ______and ______
Rock Cycle - shows how rocks change from one type to another type
p.311 How do scientists know how old rocks are? ______
Igneous Rock pp.314-320
Magma is ______, lava is ______
When magma or lava ______and ______, it becomes an igneous rock
Extrusive igneous rock forms on/above the Earth’s surface. Cools too fast for ______
Examples: ______, ______
Intrusive igneous rock forms underground. Cools very slowly so crystals are ______
Examples: ______, ______, ______
p.320 How do geologists know there is a super volcano under Yellowstone National Park?
Sedimentary Rock pp.324-330
Layers of ______are deposited over time. Mineral act like cement to hold the grains together.
Clastic sedimentary rock is made of broken pieces of ______and ______
Examples: ______, ______
Chemical sedimentary rock is made when minerals ______from water
Usually made of one mineral, all same color
Examples: ______, ______and ______
Biochemical sedimentary rock is made by or contains remains of ______
Examples: ______, ______, ______
Coal is made of the remains of ______and ______from prehistoric (dinosaur times!) swamps
p.330 How did the crystals in the cave grow so big?
Why did they stop growing?
Metamorphic Rocks pp.334-340
An original rock is changed by ______and ______into a completely different, new type of rock. The original rock that changes is called the ______
Foliated metamorphic rock contains parallel ______or bands of flat and elongated minerals.
Examples: ______, ______, ______, ______
Nonfoliated metamorphic rock have mineral grains with a random texture (no bands)
Examples: ______, ______
p.340 Pink granite from the Llano Uplift was used to build the Texas capitol in Austin. How did Enchanted Rock near Fredricksburg become exposed to the surface?