Convection Quiz

What happens to the molecules in a fluid when it is heated?

• They move faster and collide more violently

• They slow down and spread farther apart

• They become denser and sink

What causes heated fluid to rise?

• Increased density

• Increased buoyancy

• Slower movement of molecules

• Decreased pressure

Why does cooler fluid sink?

• It has less tightly-packed molecules and becomes less dense

• It has more tightly-packed molecules and becomes more dense

• It becomes more buoyant

• It moves faster

What is the result of heating a container of fluid from below?

• The fluid nearest the heat source rises

• The fluid on the surface becomes hottest

• The fluid farthest from the heat source rises

• The fluid on the surface becomes coldest

What is the circulation caused by heating a container of fluid called?

• Radiation cell

• Convection cell

• Conduction cell

• Insulation cell

What drives plate motion in the Earth's mantle?

• Tectonic plates

• Erosion

• Convection

• Subduction

What is the ultimate cause of most of the large-scale features on Earth’s surface?

• Mantle convection

• Plate motion

• Tectonic plates

• Erosion

What is the slow-moving current driven by ocean convection called?

• Marine current

• Tidal stream

• Oceanic drift

• Global conveyor belt

What causes ocean breezes to blow during the day near the coast?

• Conduction in the air

• Insulation of the water

• Convection in the air

• Radiation from the sun

What drives the spreading apart of tectonic plates at mid-ocean ridges?

• Subduction

• Erosion

• Tidal forces

• Convection in the mantle