Development of a Theory

In the Atlantic ocean, where is the youngest seafloor located?

• Towards the edges, near the eastern and western continents
• Towards the middle of the ocean
• Towards the north and south poles
• Young seafloor is located randomly throughout the ocean

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

True or False: The Mid-Atlantic ridge in the Atlantic ocean is the ONLY place that has 2 tectonic plates spreading apart (<---->)

• True

• False

What two words are BEST used to describe how the seafloor spreads?

• Magma and convection (the conveyor belt)

• Earthquakes and convection (the conveyor belt)

• Volcanoes and earthquakes

What is the rate at which tectonic plates are moving?

• Between 1-9 mm per year

• Between 1-9 cm per year

• Between 1-9 km per year

• Between 1-9 inches per year

True or False: The plates will never stop moving

• True
• False

Tags

NGSS.MS-ESS2-3

As new seafloor moves away from an ocean ridge, the seafloor cools and becomes less dense than the material beneath it.

• True

• False

The youngest rocks on the ocean floor are located __________.

• near continents

• at mid-ocean ridges

• far from mid-ocean ridges

• near Asia

Which of the following best explains the age of oceanic crust and ocean-floor features?

• seafloor spreading

• continental drift

• subduction

• crystallization

New crust is continually formed at _________.

• mid-ocean ridges

• trenches

• subduction zones

• ocean basins

The theory of _____________. explains how new crust is created at mid-ocean ridges.

• seafloor spreading

• continental drift

• plate tectonics

• ocean trenches