Igneous Rocks
Molten rock found beneath the Earth's surface that can form igneous rock.
What is magma? (magma only accepted answer)
These are little pieces of rocks, pebbles, mineral grains, and shell fragments that eventually form rocks.
What are sediments?
The way light reflects off of a mineral.
What is luster?
Name the three types of rock groups.
What is Sedimentary, Igneous and Metamorphic?
The process of rocks changing from one kind of rock to another kind of rock over long periods of time.
What is the rock cycle?
This kind of igneous rock is formed when magma cools beneath the Earth's surface.
What is Intrusive igneous rock?
These are two ways that sediments are formed.
What is weathering and erosion?
The scale that is used to measure the hardness of minerals
What is Moh's Hardness Scale
Which type of igneous material cools the fastest?
(lava, magma, sediment, or sandstone)
Lava (because it is on Earth's surface).
Name two ways people use rocks.
What is buildings, walls, roads, jewelry, decoration, countertops?
This type of igneous rock forms when lava cools on the Earth's surface.
What is Extrusive igneous rock?
These 2 things cause metamorphic rocks to form.
What are heat and pressure?
Another way to identify minerals; it leaves the color of the powder behind when rubbed against a rough white tile.
What is streak?
A naturally occurring, inorganic solid, that has a definite chemical composition and crystal structure.
What is a mineral?
What happens if an igneous rock weathers? What rock does it turn into?
What is sedimentary rock?
This type of igneous rock is black with a glassy texture. We looked at it in class.
What is obsidian?
Type of rock formed by being compacted under many layers of rocks?
What is sedimentary?
The property that causes a mineral to glow under ultraviolet light
What is flourescent?
A hard substance composed of one or more minerals.
What is a rock?
The hardest mineral.
What is a diamond?
This determines the size of crystals that form in igneous rocks.
What is the cooling rate of the magma or lava? (how fast or slow it cools)
The process where sediments become glued together.
What is cementation (compact & cement)?
You can see this property just by looking at a mineral. Many minerals can be several of these.
What is color?
Igneous rock that has fine-grained crystals
What is extrusive igneous rock?
The 5 ways to test the properties of a mineral.
What is luster, streak, hardness, color and cleavage or fracture