8th grade Science: Unit 8 Plate Techtonics

What crustal feature is formed when the two plates collide?

• folded mountains
• trenches
• lithosphere
• volcano

A tectonic plate of oceanic crust is colliding with a plate of continental crust . What type of feature may form?

• mountains
• trench
• coastal volcanoes
• all of these

Earth's thin, outermost layer is the ____________________.

• folded mountains
• trenches
• lithosphere
• volcano

Sea-floor spreading occurs at what type of plate boundary?
a _____________ boundary

• convergent 
• divergent
• transform
• continental

Convection currents in Earth's mantle are believed to be responsible for....

• ocean currents
• crustal plate movements
• climatic changes
• uneven surface heating