Plate Tectonics and Earth's Layers

The youngest rocks on the ocean floor are located

• near continents
• at mid-ocean ridges
• far from mid-ocean ridges
• near Asia

Scientists have observed that the continents move apart or come together at speeds of a few centimeters per

• century
• decade
• day
• year

the presence of the same________on several continents supports the hypothesis of continental drift.

• fossils
• rocks
• neither a nor b
• both a and b

the hypothesis that continents have slowly moved to their current locations is called

• continental drift
• continental slope
• magnetic reversal
• convection

Plates move apart at ___________ boundaries.

• convergent
• stable
• divergent
• transform

The alignment of iron minerals in rocks when they are formed reflects the fact that Earth's ___________has reversed itself several times in the past.

• Magnetic Field
• core
• asthenosphere
• gravity

Plates slide past one another at 

• subduction zones
• transform boundaries
• convection currents
• divergent bounda

The boundary between two plates moving together is called a _____________.

• divergent boundary
• convergent boundary
• transform boundary
• lithosphere

While studying the ocean floor, scientist found______________bands of magnetism.

• plastic
• alternating
• no
• rectangular

In order to complete a convection current, the rising material must eventually __________Earth.

• stop inside
• cool
• sink back into 
• warm