CLINCHER ROUND

Which seismic wave cannot travel through liquid outer core?

• P-waves

• S-waves

• Surface waves

• Rayleigh waves

Which evidence BEST explains why ocean floor rocks are younger than continental rocks?

• Presence of fossils

• Radioactive dating

• Seafloor spreading

• Mountain formation

Why does subduction occur at convergent boundaries?

• Continental crust is denser

• Oceanic crust is denser

• They have equal density

• Both sink together

Which boundary creates the deepest ocean trenches?

• Transform

• Divergent

• Convergent (subduction)

• Hotspot

Which scientist’s discovery of mid-ocean ridges provided proof for seafloor spreading?

• Hess

• Darwin

• Wegener

• Wilson

Which theory unified continental drift and seafloor spreading?

• Law of Superposition

• Plate Tectonics Theory

• Catastrophism

• Elastic Rebound Theory

Why do earthquakes occur at transform boundaries?

• Magma pushes plates

• Plates slide past each other, causing stress

• Plates move apart

• Plates collide

What happens to old oceanic crust at subduction zones?

• It rises to form ridges

• It sinks into the mantle

• It becomes continental crust

• It stays in place

Why are the Himalayas higher than other mountains?

• Volcanic eruptions

• Continental-continental collision

• Seafloor spreading

• Hotspot activity

What is the primary reason seismic shadow zones exist?

• Different rock layers

• Earth’s rotation

• Liquid outer core blocking S-waves

• Magnetic field