Name It
When two plates move in opposite directions laterally/horizontally.
Transform Boundaries
Fill in the blank:
Volcanoes can be active, ________ or extinct.
dormant
Earthquakes that release their energy beneath the ocean are called:
Tsunamis
DAILY DOUBLE:
What is the world's largest plate?
The Pacific plate, at 39,768,522 square miles
What and where is the Ring of Fire?
Very active area that surrounds the Pacific Ocean. Most of the worst EQ’s in world history have occurred in this region.
Continents were once all connected and just drifted over the years.
Continental Drift
What is usually the largest type of volcano?
Shield
Another name for the crust is:
The lithosphere
Describe Convergent Forces.
Where two tectonic plates come together. They compress against each other.
Define: volcanic vent.
Opening in earth's surface through which a volcanic eruption takes place
The only liquid part of the earth.
The outer core
How many types of volcanoes are there? Name them.
Three: shield, composite and cinder cone
Describe 'liquefaction'.
When soil loses strength and stiffness in response to an applied stress, usually an EQ or other sudden change in stress condition, causing it to behave like a liquid.
Describe Transform Boundaries.
when two plates move in opposite directions laterally/horizontally
Define fault line and focus.
Fault line: fracture between two pieces of rock
Focus: the origin of an earthquake
These occur where convergent forces result from two plates colliding.
Subduction zones
What is generally the most destructive type of volcano?
Composite
An earthquake’s intensity is dependent on four things. What are they?
Strength of EQ (magnitude)
Distance from Epicenter
Nature of surface materials
Building design
Describe Divergent Forces.
when two plates move in opposite directions laterally/horizontally
Define magma and lava.
Magma : molten rock (usually contained in a magma chamber)
Lava : Magma once at the surface of the earth
Name three natural disasters tectonics are responsible for.
EQs
Tsunamis
Volcanoes
Name three characteristics of a cinder cone volcano.
- have short lives
- very short in height
- very explosive, but have small chambers
- made from pyroclasts
Describe what an earthquake is and how it is caused.
You must use these terms: plates, fault line, focus, epicenter.
* Mr. Edie will judge. *
OPEN TO BOTH TEAMS:
How many major plates are on earth? Name them.
Seven:
African, Antarctic, Eurasian, Australian, North American, Pacific, South American
Describe both P-waves and S-waves.
•P Waves: “Primary” Waves that travel faster, but do less damage
•S Waves: “Secondary” Waves that travel slower, but do far more damage