Tsunamis
Layers of the Earth
Plate tectonics
Random I
Random II
100
What ocean do most tsunamis occur in?
The Pacific Ocean
100
What would be the best way to describe the crust?
thin, rigid, outermost layer
100
What is the theory of plate tectonics?
Plates moving under the surface
100
What is Pangea?
A supercontinent from long ago when all the continents were all one landmass
100
What does seafloor spreading provide evidence for?
plate movement
200
Is a tsunami multiple waves or just one wave?
Multiple
200
What would be the best way to describe Earth's mantle
thich, most solid layer
200
What are the geologic features on Earth's surface that were formed by the movement of the plates? List 4
volcanos, ridges, earthquakes, mountains
200
What is some evidence Pangea happened?
Answers vary (could include): fossil records, continental boundaries, etc.
200
What are mid ocean ridges?
underwater mountain ranges
300
What natural events can cause a tsunami to occur? List 4
landslides, earthquakes, volcanos, asteroids
300
Where is the rock the hottest, at the surface or in the mantle?
mantle
300
What are 3 boundaries?
convergent, transform, divergent
300
What is the ring of fire and how was it formed?
A long chain of volcanos that encircle the Pacific; plate boundaries moving
300
When sea floor spreading happens it makes a new floor. So, where is the oldest and youngest rock located at these mid ocean ridges?
youngest- center
oldest- edge
The older the farther from the ridge
400
What is a wave train?
A series of waves made by a tsunami
400
What is Earth's inner core made of?
Solid hot metal
400
What is the process in which the heat from the core transferred to the crust?
convection
400
Where do most earthquakes occur?
convergent/ transform boundaries
400
What is erosion? What is uplift?
erosion- slow wearing down
uplift- growing because of convergent boundaries
500
What are the differences in wave height and wavelength between tsunami waves in shallow water and tsunami waves in deep water?
Shallow- large waves/ short wavelengths
Deep- small waves/ long wavelengths
500
What is the order of Earth's layers? (out to in)
crust, mantle, outer core, inner core
500
What does convection have to do with the movement of the Earth's surface? What does the core have to do with convection?
inner core heats up -> magma becomes less dense -> mantle rises -> cools at surface -> it becomes denser and sinks
500
What is happening in the picture? How does it form?
ridges; underwater volcanos from cracks in Earth's surface
500
What happens when a mountain's uplift rate is higher than its erosion rate?
It grows