Parts of the lithosphere that move and interact causing changes in the earth's surface and potentially disastrous events for people
The edges of tectonic plates; areas of intense seismic activity(earthquakes, volcanoes, and tsunamis)
Plate boundary where two plates move away from each other
Plate boundary where two plates are moving toward each other
A convergent boundary where the more dense plate sinks below the less dense plate
Plate boundary where two plates slide past each other
Vibrations that travel through the earth caused by plate movements
When the crust is pushed together forming hills and mountains; caused by convergent plates.
The spot on the earth's surface exactly ABOVE where the earthquake happened
The EXACT spot in the earth's crust where an earthquake occurs
Caused by divergent plates pulling apart at areas above sea level. The land between the two diverging plates sink into a valley.
Rift Valley, Mid ocean ridge
What are the two results from a divergent plate boundary that we talked about?
What causes the Himalayan Mountains to form?
Why will Chadwick PV end up near Alaska some day?
What physical feature is seen with a subduction boundary?
Subduction happens: Oceanic crust goes below the continental crust.
Why is density so important when studying plate boundaries?
Divergent Boundary, Convergent Boundary, Transform Boundary. Plates move apart at divergent boundary, collide at convergent boundary, and slide by each other at transform boundary.
What are the three types of plate boundaries and what does each do in relation to other plate boundaries?
Divergent boundaries found in mid-ocean ridge.
What kind of boundary is a mid-ocean ridge?
Pillow lava are special formations at the ocean floor. It forms when basalt lava flows out under water. It is located at the ocean floor, and can be located near the ancient mid-ocean ridge.
What is pillow lava and where is it found?
When oceanic plates collide, once subduct under the other. Trench is formed when this happens.
What happens when ocean plates come together? What landform does this event create?
Density: A denser plate subducts under a less dense one. Age: Older plate subducts under younger plate.
What features of a plate determine whether a plate will subduct under another plate?
Continental plate is more buoyant and less dense then oceanic plate. Since oceanic plate is denser, it will subduct.
Which is more buoyant—a continental plate or oceanic plate? Which would subduct if the two were to collide with each other?
The subducting plate brings its continent right up against the continental plate. Then, because the forces in the lower mantle that controls the movements of the lithospheric plates are too great to be changed by this collision. The continents cannot be sucked into trench since granite rocks are too buoyant, so the continent plates collide. Ex)Himalayan Mountains, "India" continent
What happens when two continental plates collide? Give an example of collision.
Crack in the plate
Part of a plate that leans or hangs on another part of a plate along a fault
Opposite the hanging wall along a fault. (Shaped like a shoe kind of)
(divergent) hanging wall slides down the foot wall
(transform boundary type) the two pieces slide along the fault line
(convergent) hanging wall slide Up the foot wall
Stored energy: Energy depending upon on objects condition or position; not moving
Measured energy of motion of an object
A person who studies and interprets seismic waves
Compaction (domino) waves that travel away from an earthquake in all directions
Side to side waved that leave an earthquake at the same time as a P-wave but travels slower. ------- cannot travel through liquid
Because S-waves cannot travel through the earth's core(liquid) they cannot be detected on the opposite side of the earth after an earthquake.
Using three references (a triangle) to locate a position
Tool used to identify location and size of earthquakes
The difference in energy from lowest to greatest (usually in a wave)
The value between two markers on a measuring tool
Seismic Waves; caused by events like earthquakes and meteoroids
What are these vibrations that travels through Earth called and what causes them?
What have seismic waves revealed about Earth's interior?
During the wave motion, what moves from one place to another?
What are the two general types of wave motion described in this section?
-can go through everything
-pushes the rock
-cannot go through liquid
-goes side to side
-travels like light energy
List the two most important seismic waves used for studying Earth's interior. Give three facts about each type of wave.
they can slow down or speed up, or bent
What can happen to seismic waves as they travel through Earth?
s-shadow is a shadow that is created when s-waves cannot go through liquid
What are S-shadows?
it tells us outer core must be liquid
What do S-shadows tell us about the interior of Earth?