Ch. 7 Lesson 2 Quiz Review

What is seafloor spreading?

• The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge

• The process by which new continental crust forms along a mid-ocean ridge and older continental crust moves away from the ridge

• The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves towards the ridge

• The process by which new continental crust forms along a mid-ocean ridge and older continental crust moves towards the ridge

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What is a mid-ocean ridge?

• a mountain ranges located on the seafloor in the middle of the ocean

• The heavy presence of sediment on the ocean floor

• a long mountain chain that is located near the oecan

• The discovery of large amounts of basalt on the ocean floor

How do scientists use echo sounder to measure the ocean floor?

• Scientists use echo sounder pick up satellite messages from satellites planted at the bottom of the ocean floor.

• Scientists use echo sounder to measure the distance between one continent to another.

• Scientists use echo sounder to measure the height of different underwater mountain ranges.

• Scientists use an echo sounder to measure the depths of the ocean floor

How do mountains form along a mid-ocean ridge?

• Sediment builds up around the ridge, forming mountains

• The lava cools and forms new crust that cracks, causing rocks to move up or down and form mountains

• Large amounts of lava erupt from the center of the ridge and cool to form mountains

• The movement of the tectonic plates causes mountains to form along the ridge

Tags

NGSS.MS-ESS2-3

What does ocean topography mean?

• how deep the ocean is

• how deep mid-ocean ridges can be

• how wide abyssal plains are

• the layout of the seafloor

Tags

NGSS.MS-ESS2-3

How does an echo sounder work?

• scientists measure data from satellites on the ocean floor

• scientists send signals to the bottom of the ocean floor and then they bounce back to the ship at the surface

• scientists send signals out into the ocean to see if any marine animals echo in return

• it measures how wide the ocean is

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which is longer - a mid-ocean ridge or a mountain ranges found on land?

• mountain range on land

• mid-ocean ridge

Tags

NGSS.HS-ESS1-5

Where does seafloor spreading take place?

• in the asthenosphere

• at Continental coastlines

• at the bottom of the ocean

• at mid-ocean ridges

Tags

NGSS.MS-ESS2-3

What is created during seafloor spreading?

• new crust

• old crust

• mountain ranges

• mid-ocean ridges

How are the continents actually moving?

• Continents move due to the movement of tectonic plates

• Continents move through the solid mantle and the seafloor

• Continents move as the seafloor spreads along a mid-ocean ridge

• Continents move as the seafloor sinks beneath them

Tags

NGSS.MS-ESS2-3