Seafloor

The ocean floor sinks beneath a deep-ocean trench and back into the mantle in a process known as ________.

• convection

• subduction

• continental drift

• plate tectonics

What is formed at the subduction zone?

• mountain ranges

• deep-sea trenches

• oceanic ridge

• hills and valleys

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which of the following supports the theory of seafloor spreading? (Choose ONE)

• Correlation of rock layers

• Continents fitting together like puzzle pieces

• Magnetic Reversal recorded in the rocks on both sides of the mid-ocean ridge

• Continuous Mountain Chains

Tags

NGSS.MS-ESS2-3

Sea-floor spreading always begins at the

• Deep ocean trench

• Mid-ocean ridge

• Continent's edge

• Abyssal plain

Tags

NGSS.MS-ESS2-1

The process of seafloor spreading...

• creates new oceanic crust

• destroys or recycles crust

• creates new continental crust

• creates old crust

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

In the Atlantic ocean, where is the youngest seafloor located?

• Towards the edges, near the eastern and western continents

• Towards the middle of the ocean

• Towards the north and south poles

• Young seafloor is located randomly throughout the ocean

Tags

NGSS.MS-ESS2-3

The ocean floor is made up of what kind of 'new' rock?

• Granite

• Basalt

• Sulfur

• Calcite

Tags

NGSS.MS-ESS2-1

When looking at mid-ocean ridges the oldest rocks are

• In the middle

• Found close to the rift zone

• Found far from the mid ocean ridges

• Found close to the mid-ocean ridges

Tags

NGSS.MS-ESS1-4

What technology was used during and after WWII to detect enemy submarines and produce the first map of the seafloor?

• Echo Sounder

• Radar

• GPS

• Magnetometer

Tags

NGSS.MS-PS4-2

Undersea mountain ranges that stretch along the seafloor are called?

• Rift

• Mid-ocean ridge

• seafloor spreading

• Continental drift

Tags

NGSS.MS-ESS2-3