Plate Tectonics

what are the 3 main layers of the Earth

• lithosphere, asthenosphere, mesosphere

• crust, mantle, core

• mantle, inner core, outer core

• crust, mantle, inner core

Which layer is responsible for the moving tectonic plates

• The crust because it is apart of the lithosphere

• The mantle because it is where convection occurs

• The core because of it's magnetism

• The layers of the Earth don't affect the crustal plates

The idea that Earth's lands once existed in a supercontinent called Pangea is called

• Continental Drift

• Seafloor Spreading

• Plate Tectonics

• Convection

Alfred Wegener proposed the idea of the moving continents based on evidence he collected during his explorations. What types of evidence did he observe

• animal clues, plant clues, bacteria clues

• rocks made from magma, older rocks far from the mid ocean ridge, evidence of Earth's magnetic reversal

• glacier grooves in warm climates, tropical plants fossils in cool climates, similar rock patterns of mountains on different continents

• I don't know

Why wasn't Wegener's idea originally accepted?

• He had no evidence

• He could not explain how the continents moved

• He was not a respected scientist

• He had mental issues

Harry Hess used military equipment to study the ocean floor. His discoveries help to prove Wegener's idea of Continental Drift. The discovery of which crustal feature led to this?

• Volcanoes

• Earthquakes

• Mid-Ocean Ridges

• Trenches

What is the name of the process that occurs at the mid-ocean ridge?

• Seafloor Spreading

• Continental Drift

• Plate Tectonics

• Convection

Together the Continental Drift Theory and Seafloor Spreading Theory make up the Plate Tectonics Theory. This theory states that Earth's lithosphere is divided into plates that continuously move. This movement of the plates are driven by

• Earth's magnetism in the core

• Convection in the mantle

• Earth's gravitational pull

• Weathering and erosion of Earth's crustal features

Together the Continental Drift Theory and Seafloor Spreading Theory make up the Plate Tectonics Theory. This theory states that Earth's lithosphere is divided into plates that continuously move. This movement of the plates are driven by

• Earth's magnetism in the core

• Convection in the mantle

• Earth's gravitational pull

• Weathering and erosion of Earth's crustal features

The area where two lithospheric plates meet is called a plate boundary. The 3 types of plate boundaries are

• divergent, convergent, transform

• crust, mantle, core

• lithosphere, asthenosphere, mesosphere

• none of the above