1. A ____________ boundary is a boundary between tectonic plates that are moving apart.

• divergent
• stationary
• transform
• convergent

2. A ____________ boundary is a boundary between tectonic plates that are moving toward each other.

• divergent
• stationary
• transform
• convergent

3. A ____________ boundary is a boundary between tectonic plates that are moving sideways, moving past each other.

• divergent
• stationary
• transform
• convergent

4. Most divergent boundaries occur along ____________, where sea floor spreading occurs.

• rift valleys
• deep ocean trenches
• mid-ocean ridges
• subduction zones

5. New crust is added to Earth's surface at ____________.

• rift valleys
• deep ocean trenches
• mid-ocean ridges
• subduction zones

6. Divergent boundaries that occur on land are called ____________.

• rift valleys
• deep ocean trenches
• mid-ocean ridges
• subduction zones

7. When two plates collide at a convergent boundary, what happens next is determined by

• the direction the plates are moving.
• the density of the crust.
• the distance from Earth's outer core.

8. What happens when a plate with ocean crust and a plate with continental crust collide at a convergent boundary? Check all that apply.

• The less-dense continental crust is crumpled and pushed upward, forming mountains.
• The denser ocean crust is subducted, forming a trench.
• Both sections of crust are pushed upward, forming a tall mountain range.
• The less-dense ocean crust is crumpled and pushed upward, forming mountains.
• Both plates are pushed downward, forming a deep-ocean trench.

9. What happens when two plates with continental crust collide at a convergent boundary?

• Both sections of crust are pushed upward, forming a tall mountain range.
• The less-dense ocean crust is crumpled and pushed upward, forming mountains.
• Both plates are pushed downward, forming a deep-ocean trench.
• The denser ocean crust is subducted, forming a trench.
• The denser continental crust is subducted, forming a trench.

10. What happens when two plates with ocean crust collide at a convergent boundary?

• Both sections of crust are pushed upward, forming a tall mountain range.
• The less-dense ocean crust is crumpled and pushed upward, forming mountains.
• Both plates are pushed downward, forming a deep-ocean trench.
• The denser continental crust is subducted, forming a trench.
• The less-dense continental crust is crumpled and pushed upward, forming mountains.