All science is based on the assumption that the natural world behaves in a _____________ manner

• constant and regular

• logical and unified

• ordinary and aligned

• developed and organized

• consistent and predictable

What layer of Earth allows the plates to move?

• Lithosphere

• Asthenosphere

• Mesosphere

• Outer COre

The theory of plate tectonics holds that the outer rigid layer of Earth is broken into about 20 major segments called shields.

• True

• False

Transform faults occur where plates slide past one another and generate new lithosphere.

• True

• False

At transform fault boundaries, two plates . . . .

• Collide and form mountains

• Collide and form volcanoes

• Tear apart and form ridges

• Grind past each other causing earthquakes

The region where oceanic lithosphere descends into the asthenosphere is called ____________.

• Subduction zone

• Divergent boundary

• Submissive zone

• Transform boundary

Most of Earth's seismic activity, volcanism, and mountain building occur along ___________

• Random trends

• Plate boundaries

• Hot spots

• lines of magnetism

• parallels of latitude

The type of plate boundary where plates move together, causing one of the slabs of lithosphere to be consumed into the mantle as it descends beneath an overriding plate, is called _________

• convergent

• divergent

• gradational

• transitional

• transform

Typical rates of seafloor spreading average around ______ per year.

• 2-20 km

• 2-20 ft

• 5-30 km

• 2-20 cm

• 5-30 dm

The name given by Alfred Wegener to the supercontinent he believed existed prior to the current continents as _______

• Pancreas

• Euroamerica

• Atlantis

• Gondwanaland

• Pangaea