The youngest rocks on the ocean floor are located ____.

• near continents

• at mid-ocean ridges

• far from mid-ocean ridges

• near Asia

In sea-floor spreading, molten material rises from the mantle and erupts

• in deep-ocean trenches

• along the edges of all the continents

• along mid-ocean ridges

• at the north and south plate

Tags

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

Process by which new ocean crust forms.

• Seafloor spreading

• Continental drift

• Mid-ocean ridge

• Rift

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The OLDEST seafloor is located? 

• Closest to the mid-ocean ridge
• Farthest from the mid-ocean ridge

True or False : Sea-floor Spreading adds new material to the ocean floor?

• True
• False

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

_______ are mountain chains on the ocean floor.

• Sea-floor ridges

• Mid-ocean ridges

• Tectonic plates

• Photosynthesis

Tags

NGSS.MS-ESS2-3

Mid-ocean ridges are the sites of intense _________ activity.

• emotional

• volcanic

• earthquake

• mathematical

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

At a mid-ocean ridge, melted rock rises through cracks in the _________.

• ceiling

• river

• inner core

• sea floor

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

As the melted rock cools and hardens,

it forms new ________.

• volcanoes

• hope

• core

• crust

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2