Plate Boundaries-- 6th Science

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Who developed the idea of continental drift?

• Harry Hess
• Alfred Wegener
• Charles Darwin
• Isaac Newton

Which of the following causes the cooler magma in the mantle to sink and the hotter magma to rise?

• Plate Movements
• Sea-floor spreading
• convection currents
• continental drift

What type of boundary is the San Andreas Fault?

• Transform
• Convergent
• Divergent

What is the theory called that says that Earth's outer crust is divided into several different plates?

• continental drift
• sea-floor spreading
• convection theory
• plate tectonics

Continental crust is YOUNGER than oceanic crust.

• true
• false

What is the process that transfers the energy to Earth's crust from the mantle causing the plates to move?

What forms when two oceanic plates collide?

• rift valley
• mountain ranges
• volcanic island arcs
• continental shelf

Who introduced the idea of sea-floor spreading?

• Harry Hess
• Alfred Wegener
• Charles Darwin
• James Cook