1. How is continental crust different from oceanic crust?

A. Continental crust is more dense and contains a lot of basalt.

B.Continental crust is thinner and younger.

C. Oceanic crust is thinner and younger.

D.Oceanic crust is thicker and contains a lot of granite.

2. Where do subduction zones often occur?

A.where a continental plate is being split into two parts

B.where an oceanic plate is moving toward a continental plate

C.where two oceanic plates are moving away from each other

D.where two continental plates are colliding

3. At which type of boundary do lithospheric plates collide?

A.convection boundaries

B.contour boundaries

C.gravitational boundaries

D.convergent boundaries

4. What is the best description of a convergent boundary?

A.plates that move side by side past each other

Q2. Subduction zones occur all around the edge of the Pacific Ocean, offshore of Washington, Canada, Alaska, Russia, Japan and Indonesia. Called the "Ring of Fire," these subduction zones are responsible for the world's biggest earthquakes, the most terrible tsunamis and some of the worst volcanic eruptions.

a) Where two continental plates are colliding, creating a convergent boundary. One plate slips under the other because of convection currents in the mantle.

Explanation: