Seafloor Spreading

What is created at the location of the mid-oceanic ridge?

• Oceanic trench

• New oceanic crust

• Continental crust

• Folded mountains

Tags

NGSS.MS-ESS2-1

What is the term used to describe the process by which new oceanic crust is formed at mid-ocean ridges and spreads outwards?

• Paleomagnetism

• Magnetic reversal

• Isochron

• Seafloor spreading

What instrument is used to measure the strength and direction of magnetic fields?

• Seafloor spreading

• Isochron

• Paleomagnetism

• Magnetometer

What is the term for a line on a map that connects points of the same age formed at the mid-ocean ridges?

• Magnetometer

• Paleomagnetism

• Seafloor spreading

• Isochron

What was the common belief about the oceanic crust before the 1940s and 1950s?

• It was believed to be constantly changing

• It was believed to be younger than the continental crust

• It was believed to be unchanging and much older than the continental crust

• It was believed to be the same age as the continental crust

Tags

NGSS.MS-ESS2-3

What technological advancements in the 1940s and 1950s changed the perception of the ocean floor and crust?

• Television

• Sonar technology

• Satellite imagery

• Computers

What geological feature is formed at the boundary where two sections of oceanic crust are moving apart?

• Trench

• Mid-ocean ridge

• Continental crust

• Rift valley

Tags

NGSS.MS-ESS2-3

Where is the newly formed oceanic crust located in relation to the mid-ocean ridge?

• Farther from the mid-ocean ridge

• Closest to the mid-ocean ridge

• Beneath the continental crust

• Along the trench

Tags

NGSS.MS-ESS2-3

What does SONAR stand for?

• Sound Navigation and Ranging

• Sonic Navigation and Ranging

• Sound Navigation and Receiving

• Sonic Navigation and Receiving

Tags

NGSS.MS-PS4-2

What feature did Tharp's map reveal in the middle of the Atlantic Ocean?

• A mountain range

• A deep trench

• A rift valley

• An underwater volcano

Tags

NGSS.MS-ESS2-3