Earth's Layers
Earth's Layers II
Continental Drift
Plate Tectonics
Plate Tectonics II
100
What are the 2 main metals that make up the Earth's core?
Iron and nickel
100
Which layer is a solid ball of mostly iron that does not melt due to the high pressure of the layers on top of it?
inner core
100
Who is the scientist that came up with the concept of continental drift?
Alfred Wegener
100
The tectonic plates are located in the ____________.
lithosphere
100
What is the cause of the creation of a mid-ocean ridge?
A. plates colliding in the lithosphere
B. plates sliding past each other in the lithosphere
C. plates moving away from each other in the lithosphere
200
Which of these is more dense:
Oceanic crust or continental crust
Oceanic crust
200
Which layer of Earth is completely liquid?
Outer core
200
What is an explanation of observations of events that is based on knowledge from many observations and investigations?
Scientific theory
200
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What is the most likely feature to form from the movement of this type of plate boundary?
A. subduction of an oceanic plate
B. mountain building
C. volcano
D. rift valley
D. rift valley
200
When an oceanic plate and a continental plate collide in the lithosphere, what happens?
subduction zone, subduct, oceanic plate subducts underneath the continental plate
300
The lithosphere is located in which 2 layers?
Crust and upper part of upper mantle
300
Which layer of Earth generates Earth's magnetic field?
Outer core
300
What year did Alfred Wegener come up with continental drift?
1912
300
Name the boundary and draw the arrows indicating the movement for the type of boundary where only faults and shallow earthquakes frequently occur
This is a transform boundary
300
True or False: 80% of earthquakes occur at convergent boundaries
True
400
The part of the mantle called the ___________ which is made up of a soft rock that bends like plastic.
asthenosphere
400
What is the composition of the crust, mantle, and core?
Crust - basalt and granite
Mantle - magnesium (and oxygen and silicon)
Core- iron and nickel
400
What are three pieces of evidence Wegener used to try to support his hypothesis of continental drift?
Fossil evidence
Geological evidence
Pangaea
Also acceptable: ancient glacier locations
400
Heat from the Earth's core is transferred to the crust by ____________ in the ________.
convection in the mantle
400
Mid-ocean ridges occur at divergent boundaries. Molten rock erupts from the mid-ocean ridge and cools, creating new crust. What is this called?
seafloor spreading
500
Fill in the blanks:
The rigid _________ floats or moves on the slowly flowing ___________ which creates the movement of tectonic plates.
Blank 1: lithosphere
Blank 2: asthenosphere
500
A model commonly used as a model of Earth is called a density column. Liquids with different densities are layered on top of each other.
What aspect of Earth's layers is this trying to represent?
the relative position of Earth's layers
500
Continental drift did not accurately explain what important part about the movement of continents?
how and why they move
500
The Pacific Ring of Fire is a path along the Pacific ocean characterized by a lot of volcanoes and Earthquakes. Why do you think this is?
There are a lot of tectonic plate boundaries
500
What comes out of the Earth when plates diverge?
magma