Structure of the Earth
This is the thinnest and outermost layer of the Earth.
What is the crust?
This term is used to describe when two plates move towards each other.
What is a convergent boundary?
When plates move, it causes strain in the rocks at the boundaries. What term describes when this strain is released and causes the earth to shake?
What is an earthquake?
The formation of volcanoes typically occurs when this molten material pushes up from the mantle and through the crust.
What is magma?
Who was Alfred Wegener?
This is the middle layer of the earth.
What is the mantle?
This term is used to describe when two plates move away from each other.
What is a divergent boundary?
How many types of earthquake waves are there?
What is 3? (4 if you count the two types of surface waves)
How many types of volcanoes are there?
What is three?
The original concept that led Wegener to theorize about Continental Drift was that it seemed like the continents fit together like puzzle pieces. Which two continents show the most obvious fit?
What is Africa and South America?
These are the two types of crust.
What are oceanic and continental?
This term is used when two plates slide alongside each other.
What is the a transform boundary?
These are the compressional waves produced in an earthquake and are the fastest.
What are primary or p-waves?
These are volcanoes formed mostly from very fluid lava flows that spread out and form very large and flatter shapes.
What are shield volcanoes?
This is the term Wegener gave to the supercontinent.
What is Pangaea?
This is the innermost layer of the earth.
What is the core?
This property determines which plate will get subducted at a convergent boundary.
What is density?
These are the transverse waves body-waves that are not able to travel through liquid material.
What are secondary or s-waves?
The term used for magma that has reached the surface.
What is lava?
What evidence did Wegener show that indicated that Africa and South America may have once been together?
What is fossils of the same animals found in areas that looked like they were once together?
This core of the Earth is believe to be mostly made up of this metal.
What is iron?
This is responsible for the "force" that causes the plates to move.
What is convection currents?
This a line are plane of rock where there is movement during an earthquake.
What is a fault?
These type of volcanoes are made of mostly rock and ash ejected from of the volcano and are often found as vents on larger volcanoes.
What is a cinder cone?
These two continents appear to have similar rocks and mountain formations, leading Wegener to think they may have once been together.
What is Europe and North America?