Seafloor Formation

Which statement is NOT true about Iceland?

• It is located in the Pacific Ocean
• The Mid-Ocean Ridge runs through it
• It is getting bigger every year
• It is located at a divergent plate boundary
• In geological time, it is a relatively young island

Which layer of earth is the arrow pointing to?

• Crust
• Mantle
• Inner Core
• Outer Core

The North American Plate and the Eurasian Plate meet in the middle of the Atlantic Ocean. They are

• colliding
• seperating

Which layer is made of basalt and granite?

• Layer A
• Layer B
• Layer C
• Layer D

The Peru-Chile Trench runs along the coast of South America, where an oceanic plate is being subducted under a continental plate. Which of the following would you expect to find parallel to the trench?

• volcanoes
• another trench
• a mid-ocean ridge
• a hot spot

In which of these locations would you expect the rocks of the seafloor to be the youngest?

• Location A
• Location B
• Location C
• Location D

True or False: The red dots on this map are showing the locations of deep sea trenches.

• True
• False

Which has the highest density?

• granite
• basalt
• magma

Which of the following best describes the island of Maui?

• It will continue to get larger from lava flow for at least another 100 million years
• It will eventually erode and sink back into the ocean and not much of it will remain in another 20 million years
• It will begin to get larger in about 20 million years when it is back over the hot spot

Which of the following is NOT true of the Mariana Trench?

• it's in the Atlantic Ocean
• It is around 6 miles deep
• The deepest point is called the Challenger Deep
• Only specialized submarine can reach to the bottom
• It is a result of plate tectonics