Earth Structure
Earth Structure 2
Earth Structure 3
Plate Boundaries
Plate Boundaries
100
What is one thing you find in rift valleys?
Pillow basalts, and black smokers
100
Where do most of the real changes to the Earth's surface occur?
At plate boundaries
100
What is the name of the supercontinent that was once all the continents combined?
Pangea
100
What happens to tectonic plates at divergent boundaries?
The plates spread apart
100
What happens to tectonic plates at convergent boundaries?
The tectonic plates crash into each other.
200
Where do rift valleys form?
At the top of midocean ridges?
200
What causes mid ocean ridges?
Sea Floor Spreading
200
What are mid ocean ridges?
Underwater mountain ranges
200
What happens at strike-slip boundaries?
The tectonic plates slide past each other.
200
What is the main thing that occurs at Oceanic - Continental Convergent boundaries?
Volcanoes
300
Label the four parts of the Earth.
Outermost to innermost: Crust, Mantle, Outer Core, Inner Core
300
Which kind of tectonic plate is thicker?
Continental
300
What is the most obvious piece of evidence that supports the theory of plate tectonics?
All the continents fit together like a big puzzle.
300
What is the main thing that forms at oceanic-oceanic convergent boundaries?
Mountains that usually turn into islands.
300
What is the main thing that occurs at continental-continental boundaries?
Tall Mountains
400
What are the two things the crust is made up of?
Oceanic and Continental Plates
400
Which kind of tectonic plate is more dense?
Oceanic
400
What is the theory of Plate Tectonics?
Theory that the Earth's crust is made of large crustal plates that are in constant motion.
400
What is the main thing that occurs at oceanic - oceanic divergent boundaries?
Mid ocean ridges
400
What is the main thing that forms at Strike Slip boundaries?
Earthquakes
500
What is the outer and inner core mostly made of?
Liquid metals, Fe and Ni.
500
Why is the mantle on top of the outer and inner core? Why does it "float above them?
It has nonmetals in it while the core and outer core have mostly metals in it.
500
What proved the theory of Plate Tectonics to be true?
Sea Floor Spreading
500
What is an example of islands formed by Oceanic-Oceanic convergent boundaries?
Japan, Philippines, Aleutian Islands
500
What is an example of mountains formed by continental - continental convergent plates?
Himalayan mountains.