Earth's Layers
What the the part of the Earth that we live on?
Crust
Which boundary type made the Himalayan Mountains?
Continental - Continental
Sea floor spreading occurs because ________ at a divergent boundary.
Magma rises to the surface
The speed of seismic waves depends on the ___ of the layer of rock in which they travel.
Density
The most active volcanoes in the Pacific Ocean subduction zone is called _______.
The Ring of Fire
The ____ layer is cold, brittle, and breaks under pressure.
Lithosphere
Which type of boundary add new rock to the Lithosphere?
Divergent
Fossils are found on different continents, why?
all continents were once connected
Rand the waves fastest to slowest, Surface waves, P waves, S waves
P waves, S waves, Surface waves
_____ volcano mostly Iron and Magnesium makes a runny lava that is not explosive.
Shield
The ____ is the center of the Earth, made of Nickle and Iron.
The Core
The San Andrea's is an example of a ____ fault.
Transform
What causes Continental Drift?
Ocean ridges open and allow new rock to form and push the old rock away.
When rocks break under pressure, the ___ is where the break happens but the ___ is above it on the surface.
Focus, epicenter
____ volcano has lots of gas bubbles, ash and cinder cloud up in the sky.
Cinder
The ____ is the thick layer under the crust which acts like a solid and a liquid.
Mantle
The islands of Japan were created by ____ boundary.
Oceanic - Oceanic Convergent
Which Earth Layer is made of tectonic plates?
Lithosphere
What appears to cause plates to move?
Convection currents below the Lithosphere.
____ volcano has lots of silica which makes the lava thick and sticky. Lots of gas bubbles make this volcano explosive.
Composite
What are the 2 types of Crust?
Oceanic and Continental
The Andes Mountains is an example of ___ boundary.
Continental - Oceanic Convergent
Fossil records and the shape of tectonic plates indicate that all land was once together in a super continent called _____.
Pangaea
As plates move they bump and vibrate the rock causing ______.
Earthquakes
Hot spots form in the middle of plates caused by ____.
Mantle plumes