HS ESS 2 7

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

Tags

NGSS.MS-ESS1-4

New ocean crust is continually formed at ____.

• mid-ocean ridges

• trenches

• subduction zones

• ocean basins

What are mid-ocean ridges?

• Vast mountain ranges deep below the ocean's surface

• Deep underwater troughs on the seafloor

• The process by which new oceanic crust is continuously formed and destroyed

• molten rock below Earth's surface

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-3

What are ocean trenches?

• Vast mountain ranges deep below the ocean's surface

• Deep underwater troughs on the seafloor

• The process by which new oceanic crust is continuously formed and destroyed

• molten rock below Earth's surface

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What is seafloor spreading?

• Vast mountain ranges deep below the ocean's surface

• Deep underwater troughs on the seafloor

• The process by which new oceanic crust is continuously formed and destroyed

• molten rock below Earth's surface

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The mid-Pacific Ridge is the longest mid-ocean ridge

• True

• False

The Mariana Trench is the deepest landform on Earth

• True

• False

The theory of plate tectonics states that Earth's surface is made of rigid slabs of rock, or plates, that move with respect to each other

• True

• False

Tags

NGSS.MS-ESS2-3