Plate Tectonics Concepts and Processes

Miss Calahan reviews plate tectonics, covering Earth's layers, core composition, and the role of convection currents in moving the lithosphere. She explains the differences between oceanic and continental crust and discusses the theory of Pangaea and continental drift, supported by fossil evidence. The video also covers types of plate boundaries, including divergent, transform, and convergent, and the geological features they create, such as volcanoes, trenches, and mountain ranges.

What are the main components of Earth's core?

• Nickel and Iron

• Carbon and Hydrogen

• Magnesium and Aluminum

• Silicon and Oxygen

What is the lithosphere primarily composed of?

• The crust and upper mantle

• The core and mantle

• The inner core and mantle

• The outer core and crust

Who proposed the theory of Pangaea?

• Charles Darwin

• Alfred Wegener

• Galileo Galilei

• Isaac Newton

What evidence supports the theory of continental drift?

• Uniform soil composition worldwide

• Identical weather patterns across continents

• Consistent ocean currents

• Similar fossils found on different continents

How do convection currents in the asthenosphere affect the lithosphere?

• They move the tectonic plates

• They cause the lithosphere to expand

• They cool the lithosphere

• They solidify the mantle

What is a characteristic feature of divergent plate boundaries?

• Mountain ranges

• Mid-oceanic ridges

• Volcanic arcs

• Deep ocean trenches

What happens at transform plate boundaries?

• Plates move apart

• Plates slide past each other

• Plates collide

• Plates subduct

What geological feature is commonly formed at convergent boundaries?

• Plateaus

• Rift valleys

• Volcanic arcs

• Oceanic ridges

What is the result of two continental plates colliding?

• Creation of mountain ranges

• Expansion of ocean basins

• Formation of oceanic trenches

• Development of volcanic islands

Which type of crust is denser and subducts under the other during convergence?

• Mantle crust

• Oceanic crust

• Continental crust

• Core crust