Plate Tectonics

Mountains are created when....

• Two continental plates collide

• Two oceanic plates pull apart

• An Oceanic plate subducts under a Continental Plate

• Two continental plates pull apart

Tectonic plates move as fast as

• you can run

• a slug moves

• you can walk

• your fingernails grow

Before the theory of plate tectonics,most people believed that the Earth's continents ________________________

• stayed in place

• moved

• formed a hollow tube like Takis

• sank like Atlantis

Alfred Wegener named his single supercontinent ____________, which means "all Earth" in ancient Greek.

• Pandora

• Gandowandaland

• Pangea

• Percia

The San Andreas Fault in California is known as an active earthquake area. What type of

boundary is it?

• Converging

• Diverging

• Transform

• Sea Floor Spreading

The movement of the tectonic plates is caused by

• the rotation of the Earth.

• convection currents in the Asthenosphere

• the gravity of the iron-nickel core.

• the Moho discontinuity.

The area where two plates slide past each other is called a ______________ plate boundary.

• transform

• convergent

• divergent

• plate tectonics

Sea-floor spreading explains how.....

• new crust is created at a divergent boundary

• volcanoes are formed on continents

• deep sea trenches are formed

It is most common for a ________________ to occur at transform plate boundaries.

• mountain

• earthquake

• mid-ocean ridge

• volcano

Wegener’s proposal of a supercontinent was supported by:

• earthquake data
• seafloor magnetism
• rock, fossil, and climate data.
• convection currents in the mantle.