Which layer of the Earth is thickest?

• crust

• mantle

• outer core

• inner core

Which layer is the thinnest?

• crust

• mantle

• outer core

• inner core

Which layer is solid and made of iron and nickle?

• crust

• mantle

• outer core

• inner core

Which layer has strong convection currents and is responsible for the crust's movement?

• crust

• mantle

• inner core

• outer core

What do we call the idea that our landmasses are shifting?

• Theory of Plate Tectonics

• Big Bang Theory

• Shifting Plates Theory

• Continental Drift Theory

What is the force that moves the continents?

• Conduction

• Convection

• Radiation

• Tread Mills

What are the three main pieces of evidence used to explain the continental drift theory?

• Earthquakes, floods, volcanoes

• Fossils, Climate, Land forms/shapes

• Shapes, Earthquakes, mountains

• Salty oceans, density of continents, hurricanes on lands

Harry Hess discovered....

• Submarines

• Deserts at the bottom of the ocean

• A new fish species

• The Mid-Atlantic Ridge

How are Alfred Wegner and Harry Hess connected?

• They are cousins

• Harry Hess was in Greenland helping Alfred Wegner explore.

• Harry Hess was one of the scientists who made fun of Alfred Wegner.

• Harry Hess accidentally discovered an explanation of how the continents might have moved.

The Atlantic Ocean is growing and the Pacific Ocean is shrinking.

• True

• False

• We aren't sure. This isn't something that can be measured.