Ever-changing Earth

What are the four main layers of Earth, from outside to inside.

• mantle, inner core, outer core, crust
• inner core, outer core, mantle crust
• crust, mantle, inner core, outer core
• crust, mantle, outer core, inner core

Identify the outermost and thinnest layer.

• Crust

• Mantle

• Outer Core

• Inner Core

What is the name of the last supercontinent that formed millions of years ago?

• Pangaea

• Bonniebranchia

What causes earthquakes?

• Millions of people jumping at once

• The earth rotating

• The movement of tectonic plates

What causes tectonic plates to move along the Earth's surface?

• wind
• ocean currents
• convection in the mantle
• expansion of the Earth

What does the theory of Continental Drift explain?

• Ocean currents move continents around the planet

• Convection works deep within the asthenosphere

• Mid-ocean ridges force tectonic plates to move

• Continents were once together and slowly drifted to where they are today

How far do tectonic plates move each year?

• Meters per year

• Centimeters per year

• Kilometers per year

• Feet per year

What is the process of convection?

• The process of hot material rising and cooler material sinking in circular patterns

• The process of hot rock solidifying and forming new crust

• The process of explaining what goes up must come down

• Strong ocean currents moving tremendous amounts of material

The fact that similar fossils are found on both sides of the ocean is evidence of

• magnetic reversal.

• global positioning.

• continental drift.

• oceanic drift.

What was the name of scientist who proposed Continental Drift?

• Harry Hess

• Alfred Wegner

• Charles Rawls

• Steven Doring