Convergent Boundaries
Describe how convergent plate boundaries move.
They are plates that move together or collide towards each other.
Describe how divergent plate boundaries move.
They are plates that move away from each other.
Describe how transform plate boundaries move.
They are plates that slide past each other.
What causes tectonic plates to move?
Convection currents in the mantle.
What is the part of the Earth that we live on called?
What geological features form at convergent boundaries?
Mountains, volcanoes, trenches.
How does new oceanic crust form?
As the divergent plates spread apart, magma rises and spills over, then cools and new crust forms.
What is the name of the scale that is used to measure Earthquake strength?
The Richter Scale
How does the mantle cause convection currents?
Heat from the core causes mantle material to rise and fall.
What are the two types of crust?
1. Oceanic
2. Continental
What is subduction?
One plate sinks beneath another.
Which of these is an example of a divergent plate boundary?
1. The San Andreas Fault
2. The Mid-Ocean Ridge
3. The Hawaiian Islands
The Mid-Ocean Ridge- because these plates split apart and are known for forming new oceanic crust, mid-ocean ridges, and rift valleys.
Which of these is an example of a transform plate boundary:
1. The San Andreas Fault
2 The East African Rift Valley
3. The Hawaiian Islands
The San Andreas Fault- because it is a transform boundary where the Pacific Plate and the North American Plate slide past each other. It is approximately 750 miles long.
How do convergent, divergent, and transform boundaries differ?
Convergent collide, divergent move apart, and transform slide past each other.
Where are the oceanic and continental crust types found on Earth?
2. Continental crust is found on any of the 7 continents.
What is the name of the mountain that formed as a result of a convergent plate boundary?
The Himalayan Mountains
What process helps widen the oceans?
Seafloor spreading
What kind of natural disaster happens at Transform plate boundaries
Earthquakes- when plates slide past each other and slip they release the energy in the form of seismic waves.
Why do earthquakes occur at all types of plate boundaries?
Stress builds up and is released as seismic waves.
What is the lithosphere made of?
Crust and upper mantle.
Why do volcanoes form at subduction zones?
Subducted plates melt, creating magma that rises.
What is an example of a Rift Valley?
The East African Rift
What is a hot spot, and how does it form islands?
Area of rising magma; plates move over it forming islands.
How does seafloor spreading create new oceanic crust?
Magma rises, cools, and forms new crust.
What is the asthenosphere, and why is it important?
Partially molten layer that allows plates to move.