Evidence of Plate Movement

Which is not an evidence of seafloor spreading?

• molten magma constantly erupting

• drilling samples of rock

• Magnetic stripes

• Fossil evidence

The youngest crust is found_________the mid-ocean ridge.

Why were magnetic patterns found on the ocean floor puzzling?

• They did not show alternating bands of normal and reversed polarity.

• They showed alternating bands of normal and reversed polarity.

• No rocks were magnetic.

• All rocks were magnetic.

Tags

NGSS.HS-ESS1-5

If you are a cartographer, what would give you an idea that the continents were once joined?

• ocean depth

• position of the South Pole

• shape of the continents

• size of the Atlantic Ocean

Tags

NGSS.MS-ESS2-3

During the 1960s, scientist were already equipped with gadgets needed to explore the deep ocean. What discovery about the ocean floor is associated with the seafloor spreading?

• mountains are denser than the mantle

• the rotational poles of the Earth have migrated

• the crust of the continents is denser than the crust of the ocean

• the crust of the ocean is very young relative to the age of the crust of the continents.

Tags

NGSS.MS-ESS2-3

Which of the following can you infer from the continuous movement of the lithospheric plates over the asthenosphere?

• all the continents will cease to exist

• all the volcanoes in the Philippines will become inactive

• the continents will not be located in the same place as they are now

• the islands of the Philippines will become scattered all over the world

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The lithospheric plates are believed to be moving slowly. What is the driving force that facilitates this movement?

• gravitational force of the moon

• magnetic force at the poles

• convection current in the mantle

• the force of the atmosphere

Tags

NGSS.MS-ESS2-3

If all the inner layers of the Earth are firm solid, what could have happened to Pangaea?

• it remained as supercontinent

• it would have become as it is today

• it would have slowly disappeared in the ocean

• it would have stretched and covered the whole world

Tags

NGSS.MS-ESS2-3

Which observation was NOT instrumental in formulating the hypothesis of seafloor spreading?

• depth of the ocean

• identifying the location of glacial deposits

• magnetization of the oceanic crust

• thickness of seafloor sediments

As the new seafloor is formed at the mid-ocean ridge, the old seafloor farthest from the ridge is destroyed. Which of the stated processes describes how the oceanic crust plunges into the Earth and destroyed at the mantle?

• convection

• construction

• diversion

• subduction

Tags

NGSS.MS-ESS2-3