Layers of the Earth
What layer of the Earth is the one that we stand on?
Crust
Igneous rock is formed when what cools?
What is magma or lava
Sedimentary rock forms when what collects and hardens into new rock?
sediment
What 2 processes make metamorphic rocks?
Heat and Pressure
When does the rock cycle end?
NEVER
What layer is the thickest?
Mantle
What is an example of igneous rock?
Obsidian, Basalt, etc
Sediment stacks up in layers that are ______________ together.
compacted or cemented
What is an example of a metamorphic rock?
Marble, Gneiss, Etc
True/False: There is a specific order to the rock cycle.
False
What happens to the pressure of the Earth as you go further down?
It increases
What is molten rock above earth's surface called?
Lava
Metamorphic rock can be formed only where on the Earth? Inside/outside/either
Inside
True/False:The rock cycle is a quick process, meaning rocks can become new rocks quickly.
False
Which layer is made of SOLID iron?
Inner Core
Why do some igneous rocks have bubbles?
They cooled so quickly that air was trapped inside.
Sediment is usually formed by ____________ and erosion.
weathering
Where does the pressure come from that causes metamorphic rock to form?
The weight of the rock above it
Which is a rigid layer occuring only in a portion of the crust: lithosphere or asthenosphere?
Lithopshere
What is the difference between intrusive igneous rock and extrusive igneous rock?
Intrusive igneous rocks cool SLOWLY INSIDE the Earth.
Extrusive igneous rocks cool QUICKLY OUTSIDE the Earth.
What is example of sedimentary rock?
sandstone, limestone, etc
True or False: A metamorphic rock can be turned into a different metamorphic rock.
True
Why might an engineer need to know about rocks when building a bridge?
If the engineer did not know about the rocks supporting the bridge foundation it could break or collapse. It could tell them where a solid place to build would be. They should know rock sizes, locations, and types.