unit 4 quiz

Which of the following is NOT a type of plate boundary?

• subduction

• convergent

• transform

• divergent

When a continental rift valley begins forming, after a long time, what will eventually result?

• new continental crust

• the rift will close

• a new ocean will form

• hot spot volcanoes will form

Which type of boundary might cause a continental rift?

• transform

• divergent

• subductive

• convergent

What type of rock makes up continental crust?

• granite

• graphite

• bituminous

• basalt

Why won't the magma from undersea volcanoes erupt violently?

• there isn't enough material

• pressure from the water

• plates don't separate fast enough

• they do erupt violently

What type of plate boundary will have one plate subduct?

• convergent

• divergent

• transform

What do the magnetic minerals found in oceanic crust tell us?

• the magnetic field is strongest over the poles

• the magnetic field is constant

• the magnetic field has reversed in the past

• the magnetic field is weakest near Rockford

Because there is no plate boundary near the edges of continents bordering the Atlantic ocean, and there is an active mid-ocean ridge in the center, what does this tell you about the Atlantic ocean?

Responses

• it is getting wider each year

• it is getting smaller each year

• it is getting deeper each year

• it is getting shallower each year

Which is NOT a property of basaltic oceanic crust?

• it is a major component of the ocean floor

• it is less dense than continental crust and gets subducted beneath continents.

• it contains minerals that can be magnetized

• it is often younger than granitic rocks in the interiors of continents.

What type of rock forms from magma that hardens beneath the seafloor?

• sedimentary

• igneous

• Metamorphic

• subductive