What is sea-floor spreading?

• The process where new ocean crust is formed at mid-ocean ridges

• The process of ocean water evaporating

• The movement of tectonic plates on land

• The formation of mountains on continents

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What helps explain continental drift and plate tectonics?

• Sea-floor spreading

• Ocean currents

• Wind patterns

• Volcanic eruptions

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What happens to magma at a mid-ocean ridge?

• It rises from the mantle

• It sinks into the ocean

• It evaporates into the air

• It turns into water

Tags

NGSS.MS-ESS2-1

What forms when magma cools and hardens?

• New oceanic crust

• Sand dunes

• Icebergs

• Coral reefs

What is a mid-ocean ridge?

• A long, underwater mountain chain where new crust forms

• A deep valley on land

• A large desert area

• A high mountain peak

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What is a rift valley?

• A deep valley that forms at the center of a mid-ocean ridge

• A mountain range on land

• A large ocean wave

• A desert canyon

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What is a deep-ocean trench?

• A deep area where old ocean crust sinks back into the mantle

• A shallow coral reef

• A sandy beach

• A high mountain range

Tags

NGSS.MS-ESS2-3

What happens to the iron in lava when it cools?

• It aligns with Earth's magnetic field.

• It turns into gold.

• It evaporates.

• It becomes water.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which rocks are the youngest in relation to the ridge?

• Rocks closest to the ridge.

• Rocks farthest from the ridge.

• Rocks in the middle of the ridge.

• Rocks on top of the ridge.

What does sea-floor spreading do to tectonic plates?

• Moves them apart at divergent boundaries.

• Pushes them together at convergent boundaries.

• Keeps them stationary.

• Destroys them.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3