The Rock Cycle
All the different types of rock are connected by the___________.
rock cycle
What are three types of rocks?
igneous, sedimentary, and metamorphic
What are streak color, light test, luster, hardness, smell, magnetism, feel and shape?
The main characteristics geologist use to test minerals.
The earth has ______ major layers.
four
How do scientist know which minerals are harder than others?
They us the Mohs scale of hardness
What scientists study the Earth, the materials that make it up, and its processes?
Geologists
Rock that breaks down into tiny pieces over time is
weathering
These types of rocks form when melted rock called lava or magma cools and hardens.
Igneous
What is a streak test?
rubbing a rock against an unglazed porcelain plate
What is 18 miles deep on land and 6 miles deep under the ocean?
The crust
Moh's scale features _____ different levels.
10
Geology involves the study of________ and __________.
rocks, minerals
What is erosion?
When water, wind or gravity move rock or sediment.
What type of rocks have beautiful striped layers?
sedimentary
Many rocks and minerals don't let light pass through, so they are ______.
opaque
Part of the mantle is solid______
rock
Some of the softest minerals are?
talc and gypsum
_________ are a special kind of matter.
Minerals
The lower layers of sediment get pressed together, __________ into sedimentary rocks.
cementing
Deep down in the ground____________ rocks form.
metamorphic
What mineral smells like rotten eggs?
sulfur
You can see parts of the mantle when _________ ________, _________ _____ _____.
volcanoes erupt, spewing out lava
There is nothing harder than a __________.
diamond
Concrete is an important _________ __________.
building material
How might igneous or sedimentary rocks get pushed deep underground?
When two tectonic plates collide and one gets pushed under the other.
What does igneous mean in Greek?
"from fire"
If a mineral sticks to a magnet, it might be ________.
magnetite
What layer of earth is completely liquid?
outer core
What hardness is a topaz?
8
Gems like diamonds and rubies are also __________.
minerals