Sea-Floor Spreading

Which features form the longest mountain ranges on Earth?

• The mid-ocean ridges

• The deep-ocean trenches

• The Rockies

• The Andes

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Which process adds more crust to the ocean floor?

• suction

• sea-floor spreading

• subduction

• magnetic stripe

Where does subduction occur?

• along the middle of some ocean floors

• down the middle of mountain ranges

• on continents

• at deep-ocean trenches

Which process or processes change the size and shape of the oceans?

• subduction only

• sea-floor spreading only

• both subduction and sea-floor spreading

• both driving for sample and subduction

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Sonar is a device that scientists use to map the ocean floor.

• True

• False

Tags

NGSS.MS-PS4-2

A deep-ocean trench is an underwater mountain.

• True

• False

Molten material erupts inside the Central Valley of mid-ocean ridges.

• True

• False

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

NGSS.HS-ESS2-3

The farther from a mid-ocean ridge a rock sample is taken, the younger the rock is.

• True

• False

Sea-floor spreading occurs at mid-ocean ridges.

• True

• False

Tags

NGSS.MS-ESS2-3

The pattern of magnetic stripes in in rocks on either side of a mid-ocean ridge is the same.

• True

• False