Volcanoes & Earthquakes

True or False? A mountain that is formed around an opening through which lava erupts is a volcano?

• True
• False

P waves..

• cause the most damage
• are the slower waves
• are the faster waves
• vibrate at right angles

What is the Richter scale?

• indicates the amount of damage done by an earthquake
• measures the amount of energy released in an earthquake
• predicts when earthquakes will occur

What is a shield volcano?

• starts with thick magma
• throws rocks and cinders into the air
• erupts with thin lava that spreads over great distances

Click the choice that best completes the sentence. "Along a transform fault boundary...."

• plates slide past each other
• sea-floor spreading takes place
• one plate slides under another plate

Choose the best answer that completes the statement. "At a divergent boundary...."

• a mid-ocean trench is formed
• sea-floor spreading takes place
• the edge of one plate melts

What does the lithosphere include?

• all of the crust
• the crust and part of the lower mantle
• the core and part of the upper mantle
• the crust and part of the upper mantle

What layer is point B pointing to?

• Mantle
• Outer Core
• Inner Core
• Crust

What happens along a transform fault boundary?

• crust is produced
• Two of Earth's plates grind past each other. Earthquakes may occur often.
• Two of Earth's plates collide

Along what types of plate boundaries do most volcanoes occur?

• rifts
• convergent 
• both
• neither