Dynamic Earth

What forms in the ocean when lava emerges from a crack in the crust due to rising magma beneath the crust?

• a ridge
• a rift
• a rip
• a rent

Tectonic plates can include

• only asthenosphere
• only oceanic crust
• only continental crust
• both oceanic and continental crust

The Pacific Ring of Fire is...

• a mid-ocean ridge
• a chain of volcanic islands
• a zone of active volcanoes
• a rift valley

The Himalaya Mountains were formed in a collision at a...

• divergent boundary
• convergent boundary
• transform boundary
• fracture zone

An example of a transform boundary is the...

• San Andreas Fault in California
• Nazca plate on the west coast of South America
• Eurasian plate at the Mid-Atlantic Ridge
• island arc of Japan

Folded mountains form...

• when a state of isostasy occurs
• when continents collide
• when continents diverge
• after huge earthquakes

When the oceanic and continental lithospheres collide...

• the oceanic plate subducts
• the continental plate subducts
• their momentum stops each other
• they reach isostacy

What happens when two oceanic plates collide?

• the denser plate fractures
• the less dense plate fractures
• the less dense plate subducts
• the denser plate subducts

What happens when two continental plates collide?

• large mountains can form
• dome mountains are likely to form
• the plates subduct beneath each other
• the impact can cause huge earthquakes

The type of stress that squeezes and shortens a body is...

• compression
• tension
• shear stress
• deposition