Plate Boundaries

3. ______ is when one plate is pulled under another.
4. Plates move because of forces in the _____.
6. At _____ boundaries, neighbouring plates are sliding past one another or locked in place as they are trying to slide past one another.
10. Where a continental plate converges with an oceanic plate, the thinner, denser _______ plate subducts beneath the thicker, more rigid ________ plate.
12. In a subduction zone, the subducted _____ becomes molten and forms magma.
13. Movements in the crust often result in _____.
15. A continental rift, often referred to as a rift valley, forms where continental plates ______.
16. At _____ boundaries, neighbouring plates are moving away from one another.
17. If magma reaches the surface without cooling and solidifying, it can break through in the form of ______ eruptions.
20. Earthquakes send out ______ waves when there is movement along transform boundaries.

1. Where plates ______ earthquakes occur and volcanoes and mountain forms.
2. At convergent boundaries, neighbouring plates are moving ______ one another.
4. The rifting of plates allows _____ to move to the surface.
5. Subduction creates a _____ between the plates and a subduction zone below.
7. Where plates move apart, ______ form.
8. The edges of tectonic plates are called _____.
9. Oceanic plates are pulled ______ continental plates.
11. During subduction, magma that is less _____ than the rest of the mantle rises to the surface.
12. At ______ boundaries neighbouring plates are moving toward one another.
14. An ______ rift, often referred to as a rift valley, forms where oceanic plates diverge.
18. Where oceanic plates converge, the ______, denser plate subducts under the less dense plate.
19. When magma cools in a rift, it creates more _____ in the gap between the plates.