C10 Plate tectonics

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.

What is this a picture of?

• plate tectonics

• continental drift

• pangaea

• glacier scaring

The theory of continental drift named a key part of this idea Pangaea. What is Pangaea?

• One of the ancient animals that helped Wegener prove that fossils from different continents originally came from the same location
•  supercontinent that existed in Earth's distant past
• The underwater ocean range in the middle of the ocean
• The hot spot which gave rise to the Hawaiian Islands, among others

The Theory of Continental Drift states that Pangaea broke apart and the continents "drifted" away from each other

• True
• False

How does fossil evidence support Wegener's hypothesis of continental drift?

• Similar fossils are found along continental margins that appear to join together.
• Fossils are found in areas where the present-day climate could not have supported the organisms that made the fossils.
• Similar fossils of giant, land-dwelling dinosaurs are found on continents separated by oceans.
• all of the above

Undersea mountain ranges are called ____________.

• rifts

• mid-ocean ridges

• seafloor spreading

• continental drift

What theory states that the continents were once part of a super continent called Pangaea and have moved slowly to their current locations over hundreds of millions of years.

• Oceanic wandering

• Land-form Evidence

• Continental Drift

• Fossil Distribution

Younger sea floor crust is located...

• farther from the mid-ocean ridges

• at the mid ocean ridges

• near the continents

What type of plate boundary is the Mid-Ocean Ridge?

• Divergent

• Convergent

• Transform

What two words are BEST used to describe how the seafloor spreads?

• Volcanoes and convection

• Tsunamis and convection

• Earthquakes and convection

• Magma and convection