Tectonics quiz 1

What is the hottest part of the Earth?

• The crust

• The inner core

• The outer core

• The mantle

What is the outer core of the Earth made of?

• Magma

• Iron and nickel

• Silicon and magnesium

• Rock and sediment

How thick is the Earth's mantle approximately?

• 1,000 km

• 2,900 km

• 5,500 km

• 60 km

What mechanism is believed to move the tectonic plates?

• Gravity

• Magnetic field

• Slab pull and ridge push

• Convection currents

What happens at a destructive plate margin?

• Plates move past each other

• Plates move apart

• Plates collide and one is subducted

• Plates merge together

What type of volcano is formed at constructive plate margins?

• Cinder cone volcano

• Shield volcano

• Composite volcano

• Lava dome volcano

What is the Earth's crust broken into?

• Continents

• Oceans

• Mountains

• Tectonic plates

What occurs at subduction zones?

• Plates collide

• New land is formed

• Plates move apart

• Older, denser plates sink into the mantle

Where do earthquakes occur?

• Only at destructive plate margins

• Along all types of plate margins

• Only at constructive plate margins

• Only in the mantle

What is the difference between oceanic crust and continental crust?

• Continental crust is younger

• Oceanic crust is denser

• Continental crust can be subducted

• Oceanic crust is found under land masses