Quiz Sea Floor Spreading Ch. 5.2

What did scientists use to map the oceans floor?

• Echo-location
• Sonar
• Space Shuttles
• Animals

What evidence helps scientists show how sea floor spreading occurs?

• Ocean Floor Material
• Magnetic Stripes
• Drilling Samples
• All of the Above

What are Mid-Ocean Ridges?

• A chain of underwater waterfalls 
• A chain of underwater volcanos
• A chain of underwater mountains
• A chain of underwater rocks

Tags

NGSS.HS-ESS2-1

Where does molten material rise and erupt to make new sea floor?

• deep ocean trench
• subduction
• mid ocean ridge
• continental crust

Tags

NGSS.MS-ESS2-1

Old oceanic crust is more dense than new oceanic crust because it is

• hot
• cool
• moving
• close to a continent

What process adds more crust to the ocean floor?

• suction
• sea-floor spreading
• subduction
• magnetic stripe

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  drilling for samples and subduction

Tags

NGSS.MS-ESS2-3

Where does subduction occur?

• along the middle of some ocean floors
• down the middle of mountain ranges
• on continents
• at deep ocean trenches

The process by which the ocean floor sinks beneath a trench and back into the mantle

• convection
• continental drift
• conduction
• subduction

Which ocean is getting bigger?

• Atlantic
• Pacific
• Arctic
• Indian