Plate Tectonics

How many major tectonic plates are there?

Who suggested the seafloor itself is moving as a result of convection currents ?

Which of the following is NOT evidence of sea floor spreading?

How often does the magnetic field reverse?

Mountains are formed by what kind of boundary ?

___________ is the theorized single sea that surrounded Pangaea.

The crust is the Earth's only solid layer.

What type of boundary is where new crust is formed?

What is believed to cause seafloor spreading ?

What is the name of the fern that gave evidence of continental drift ?

___ left striations or scars in the bedrock of continents giving evidence of continental drift?

The Glomar Challenger contributed to the the theory of plate tectonics by __.

Continental mountain ranges are usually associated with ___ boundaries.

Alfred Wegener is best known for his hypothesis of ____.

What type of mountains create the Pacific Ring of Fire ?

If a plate is made up of sea floor, then it cannot be subducted down into the mantle.

Mid-ocean ridges are associated with __ boundaries

What are stripes found on both sides of the mid ocean ridge called?

When this occurs, it is called

Earth's lightest materials make up the ______.

_____________ is the balance that keeps continents from sinking into the ocean.

The process by which an oceanic plate slides down the lithosphere-asthenosphere boundary.

What name was given to the super continent believed to exist prior to the current continents?

Areas concentrated with earthquakes along subduction zones are called?

How long ago did the super continent begin to split apart?

Which of the following appears to cause movement of Earth's tectonic plates ?

A ___ is an underwater mountain range with a rift valley running through it.

Abiotic factors are non-living parts of the ecosystem

The type of tectonic plate boundary involving a collision between two tectonic plates is ___.

What is continental drift

What is the most important factor used to determine an areas climate?

This is what kind of boundary ?

This is what kind of boundary ?

The seafloor moves at which rate per year ?

Temperature & pressure ________ toward the center of the Earth.

The part of the Earth on which the tectonic plates are able to move is the ___.

Continental drift theory suggests a single land mass broke into 2 pieces called _________

San Andres fault is an example of a _______ boundary ?

The youngest rocks on the ocean floor are located ______.

Antonio Snider did fossil correlations