continental drift and sea floor spreading

How do scientists figure out the age of the seafloor?

• They research it from ancient sea maps that trading vessels would use in the 1700s

• They use the moon phases and eclipses to calculate the age

• They use seismographs and the depth as well as location of earthquakes to calculate the age

• They take drill ships to many locations in the oceans and collect, then date, rock samples. 

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What is FALSE about the age pattern on the seafloor in the Atlantic Ocean? 

• The pattern is symmetrical on each side of the Mid-Atlantic ridge (plate tectonic boundary)

• The oldest seafloor can be found towards the edges of the ocean, near the eastern and western continents

• The youngest sea floor can be found towards the edges of the ocean, near the eastern and western continents

• Seafloor near the Mid-Atlantic ridge (plate tectonic boundary) can be up to 10 million years old

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

True or False: Our continents will eventually become a supercontinent (like Pangaea) again, far in the future

• True

• False

Tags

NGSS.MS-ESS2-3

What is the rate at which the Atlantic Ocean is expanding? 

• Between 5-10 mm per year

• Between 5-10 cm per year

• Between 5-10 km per year

• Between 5-10 inches per year

Tags

NGSS.MS-ESS2-2

True or False: The plates will never stop moving

• True

• False

Tags

NGSS.MS-ESS2-3

Which of the following supports the theory of seafloor spreading?

• Correlation of rock layers

• Crustal Age

• Magnetic Reversal

• Continuous Mountain Chains

Tags

NGSS.MS-ESS2-3

Massive pieces of land that are part of the Earth's crust and upper mantle

• Tectonic plates

• Trenches

• Divergent boundary

• Continental shelves

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NGSS.MS-ESS2-3

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

• Sonar

• Radar

• GPS

Tags

NGSS.MS-PS4-2

Undersea mountain range.

• Rift

• Mid-ocean ridge

• seafloor spreading

• Continental drift

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Process by which new ocean lithosphere forms.

• Seafloor spreading

• Continental drift

• Mid-ocean ridge

• Rift

Tags

NGSS.HS-ESS2-1