Seafloor Spreading and Plate Tectonics - Goretti

Who is the proponent of Seafloor Spreading theory?

• Alfred Wegener

• Harry Hess

• Marie Tharp

• Bruce Heezen

Where does seafloor spreading occur?

• in escarpments

• in trenches

• in mid-ocean ridges

• in the ocean floor

What technology was used by Tharp and Heezen in mapping the ocean floor?

• Global Positioning System (GPS)

• Geographic Information System (GIS)

• Digital Elevation Model (DEM)

• Sound Navigation and Ranging (SONAR)

Tags

NGSS.MS-PS4-2

What type of boundary is manifested in mid-ocean ridges?

• Convergent

• Divergent

• Side slip

• Transform fault

Tags

NGSS.MS-ESS2-3

What evidence in Seafloor Spreading supports this observation?

-Rocks near the ridge have warmer temperature compared to rocks which are far from the ridge.

• Molten Material

• Seafloor Drill

• Radiometric Age Dating and Fossil Ages

• Magnetic Stripes

What evidence of Seafloor Spreading supports this observation?

The sea floor is composed of different rocks according to ages and they are positioned equally in opposite directions (National Geographic), hence, these rocks possess similar magnetic bands.

• Molten Material

• Seafloor Drill

• Radiometric Age Dating and Fossil Ages

• Magnetic Stripes

Tags

NGSS.HS-ESS1-5

What evidence in Seafloor Spreading supports this observation?

- Rocks on the seafloor are younger than the rocks on the continental crust.

• Molten Material

• Seafloor Drill

• Radiometric Age Dating and Fossil Ages

• Magnetic Stripes

Tags

NGSS.MS-ESS1-4

What plate boundary causes the formation of volcanoes?

• Convergent

• Divergent

• Transform

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What plate boundary causes the formation of oceanic ridges?

• Convergent

• Divergent

• Transform

What plate boundary causes the formation of faults?

• Convergent

• Divergent

• Transform