7.1.2.2 Development of a Theory

What device did scientists use to measure the depths of the ocean floor?

• Echo sounder

• Radar

• Sonar

• Seismograph

What are the underwater mountain ranges in the middle of the oceans called?

• Mid-ocean ridges

• Ocean trenches

• Volcanic chains

• Seafloor mountains

What is the deepest landform on Earth?

• Mariana Trench

• Mount Everest

• Empire State Building

• Mid-ocean ridge

What is an isochron?

• An imaginary line on a map showing points of equal age

• A type of volcanic rock

• A deep underwater trough

• A device used to measure ocean depths

Tags

NGSS.MS-ESS1-4

What process explains the formation and destruction of oceanic crust?

• Seafloor spreading

• Continental drift

• Volcanic activity

• Tectonic plate collision

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What is the layer of Earth below the lithosphere called?

• Asthenosphere

• Mantle

• Crust

• Core

What is the theory that states Earth's surface is made of rigid plates that move with respect to each other?

• Plate tectonics

• Continental drift

• Seafloor spreading

• Mantle convection

Tags

NGSS.MS-ESS2-3

What is the largest tectonic plate on Earth?

• Pacific Plate

• North American Plate

• Eurasian Plate

• African Plate

How much do tectonic plates move per year?

• 1-9 cm

• 10-20 cm

• 21-30 cm

• 31-40 cm

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What is the layer of Earth that behaves like a plastic material due to its high temperature?

• Asthenosphere

• Lithosphere

• Mantle

• Crust