Layers of the Earth
Name the 4 layers of the Earth, starting with the outer most.
Crust, Mantle, Outer Core, Inner Core
What causes rocks to break down into sediments?
Weathering
How are intrusive rocks formed?
From deep inside the earth's core where it is so hot that rocks become magma
What are sediments
broken pieces of grain and rock
How are metamorphic rocks formed?
Heat and pressure
What is the thickest layer of Earth?
Mantle
What rocks are formed from molten material from the Earth?
Igneous
How are extrusive rocks made?
Forms after a volcano erupts and lava reaches the earth's surface
How do sediments end up in oceans, lakes, or rivers
Erosion
all rocks can change into metamorphic rocks
true
The hottest layer of Earth
Inner Core
How do the rocks change into metamorphic rocks?
Heat and Pressure
Why do extrusive rocks have smaller crystals than intrusive rocks?
Extrusive rocks cool faster than intrusive
How are sedimentary rocks formed?
when sediments are compacted and cemented
Metamorphic rocks are found where
deep inside the earth
What are the 3 mechanical layers of the Earth's mantle?
Asthenosphere, Lithosphere, and Mesosphere
This cycle describes how one rock type can change into another type of rock
Rock Cycle
What are the two types of Igneous Rocks?
Intrusive and Extrusive
What layer of sedimentary rocks are the oldest
Bottom layer
How many years does it take for a metamorphic rock to form
What metals are in the Outer and Inner Core
Nickel and Iron
Through what process is sediments made into sedimentary rocks?
Compaction and Cementation
Igneous Rocks can change into sedimentary rocks
True
What can happen to a rock when water flows through holes in the rock
the water will dissolve parts of the rock and carry it away
Bonus: 78% of the Earth's atmosphere is composed of
Nitrogen