Earth Tectonics

Scientists have found that rocks closer to the mid-ocean ridge are less dense than those further away. Which statement would explain these findings?

• . Rocks closer to the mid-ocean ridge are under greater tectonic pressure and are denser than rocks further from the ridge.

• Rocks closer to the mid-ocean ridge are made of rocks with different, denser minerals than rocks further from the ridge.

• Rocks near the mid-ocean ridge are further from volcanic activity and are cooler; cooler rocks are less dense than warmer rocks.

• D. Rocks near the mid-ocean ridge are closer to volcanic activity and are warmer; warmer rocks are less dense than cooler rocks.

Look at the South American Plate. What kind of boundary does it form with the Africa Plate

• Convergent

• Divergent

• Transform

Tags

NGSS.MS-ESS2-3

Look at the South American Plate. What kind of boundary does it form with the Nazca Plate?

• Convergent

• Divergent

• Transform

Tags

NGSS.MS-ESS2-3

The process of _________ occurs when large landmasses move, like when Pangaea broke apart.

• continental drift

• plate shift

• land transference

Tags

NGSS.MS-ESS2-3

Which type of plate boundary is found where "sea floor spreading" happens?

• Convergent

• Divergent

• Transform

Mark all that apply. What evidence did Wegener use to support his hypothesis

• Fossils

• Old maps

• Similar mountain ranges

• first hand accounts

Tags

NGSS.MS-ESS2-3

How do scientists study the earth's interior?

• X-ray

• Seismic waves

• Infrared

Look at the map at mark all that apply. Where does most seismic activity happen

• In Europe

• Edges of continents

• Island chains

• Center of continents

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS3-2

The seafloor farther away from the Mid-Atlantic Ridge is older than the seafloor near it.

• True

• False

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

The process by which collision between two tectonic plates forces the denser plate under the less dense plate is called __________________.

• Plate tectonics

• Seafloor spreading

• Subduction.