Plate Boundaries, Volcanoes and Mountains

____ acts on mountains to change their size, height, or surface.

• Slipping
• Erosion
• Shifting
• Sliding

Mountains made of huge rocks separated from other rocks by faults are ____ mountains.

• folded
• volcanic
• fault-block
• upwarped

Tremendous pushing forces cause a squeezing of rock layers in ____ mountains.

• fault-block
• folded
• upwarped
• volcanic

Plates move apart because of ____, a pulling force acting on plates.

• volcanoes
• tension
• faults
• rifts

When a plate at a mid-ocean ridge responds to gravity by sliding down a slope, it is called ____.

• slab-pull
• slab-push
• ridge-push
• ridge-pull

When plates _____, the tremendous forces cause mountains to form.

• collide
• subduction
• isostasy

____ is when one plate sinks beneath another plate.

• collide
• subduction
• isostasy

Hawaiian Islands that comprise Hawaii

• fault-block mountains
• upwarped mountains
• folded mountains
• underwater volcanic mountains

Mount St. Helens in Washington

• fault-block mountains
• volcanic mountains
• upwarped mountains
• folded mountains

Lava forms islands near the trench of oceanic-oceanic collisions.

• True
• False