This theory created by Alfred Wegner suggested that the continents of the Earth were once one giant super-continent.
This theory also said that the continents plowed through ocean crust as they moved.
What is the Continental Drift Theory
100
The FULL NAME of ALL of the types of waves that an earthquake produces are _____, _______, and _______.
Primary Waves, Secondary Waves, Love Waves (Surface or Land waves is acceptable as well)
100
Approximately _____% of all the volcanoes in the world form around the RING OF FIRE.
What is 75%
100
When you go farther away from the center of a spreading zone, the age of the rock is ______________.
Increasing!
100
4. The plates of the Earth move at a speed of ____________.
What is 3-10 centimeters per YEAR!
200
This theory discovered by Harry Hess suggested that ocean floor was created at mid-ocean ridges.
What is the Sea-Floor Spreading Theory
200
The instrument that scientists use to measure earthquakes is called a(n) _____________________________________.
What is a SEISMOGRAPH.
200
The three types of volcanoes are ________, _______, and _________.
CINDER CONES, STRATA VOLCANOES, SHIELD VOLCANOES
200
The convection currents that move the plates of the Earth take place in the mantle, specifically in this semi-molten layer of the mantle called the _____________________________________.
What is the Asthenosphere!
200
The core of the Earth is extremely hot. This is due to ___________________________.
What is the decaying Uranium in the core.
300
This theory suggested that the Earth is divided into many different plates which ride on a semi-fluid layer and move because of convection currents within this layer.
What is the Plate Tectonic Theory
300
The point where the rocks break inside the Earth and cause an earthquake is called the ________________________.
The FOCUS
300
TRUE or FALSE
Magma is exactly the same as lava EXCEPT magma is on the surface and lava is underneath the surface.
False!
300
The plate boundary that occurs when two plates move apart from one another is called a _________________ boundary.
What is a DIVERGENT BOUNDARY
300
The plate boundary that occurs when two plates crash into one another is called a ____________________ boundary.
What is a CONVERGENT BOUNDARY
400
The Earth is divided into ____ main plates.
What is seven.
400
The point on the surface of the Earth where the earthquake waves are first felt is called the _______________________________.
The EPICENTER
400
Describe all the steps necessary for a volcano to form at a subduction boundary.
What is two plates collide, the denser plate subducts beneath the other, the subducted plate melts and the magma that it creates rises through a fissure in the Earth's crust to form a volcano.
400
The plate boundary that occurs when two plates grind against one another is called a ______________________ boundary.
What is a TRANSFORM BOUNDARY
400
When hot ash and cinders travel down the side of a volcano at over 100 mph this is called a ___________________________ ____________.
What is a PYROCLASTIC FLOW
500
The layers of the Earth from the inside to the outside are ___________.
(Please list the scientific name for each layer)
What is Inner Core, Outer Core, Lower Mantle, Asthenosphere, Lithosphere.
500
List all of the waves that an earthquake produces, and describe how a person standing on the surface of the Earth directly above where the earthquake started would move when the waves reach them.
Primary Waves - the person would move up and down
Secondary Waves - the person would sway left and right
Love (Land) Waves - the person would roll over like being hit by an ocean wave.
500
Explain how some volcanoes can be explosive and some are not.
Explosive volcanoes have more silica and more water and gases inside the magma.
500
List, and explain the evidence that led to the formation of the Continental Drift Theory.
Continents fit together like a jigsaw puzzle, layers of the Earth from different continents match up, and the fossil patterns match up in opposing continents.
500
Describe exactly how convection currents work.
What is convection currents work because of the heat inside the core of the Earth causes the molten mantle in the Asthenosphere to rise, hit the crust, spread out, cool and fall, and repeat.