8th ch8-3

How does heat move?

• from a warmer to a cooler object

• from a cooler to a warmer object

• toward a hot object

• away from a cold object

How is energy from the sun transferred?

• by radiation

• by conduction

• by convection

• by force of gravity

Heat from which of these causes convection currents in side Earth?

• mantle

• crust

• crust and mantle

• crust and core

• mantle and core

Which of these combines with changes in a fluid's density and the force of gravity to set convection currents in motion?

• evaporation of a fluid

• condensation of a fluid

• freezing and melting of a solid

• heating and cooling of a fluid

______________ is the transfer of heat by the moverment of a fluid.

• Radiation

• Convection

• Conduction

When you heat up an object, the particles in the object move _________.

• slower

• faster

• the same

A cool fluid is _____________ dense than a warm fluid.

• more

• less

• the same

When you touch hot sand, heat is transferred by _______________ to your skin.

• convection

• conduction

• radiation

• force

________________, convection, and conduction are the three types of heat transfer.

• Electric

• Solar

• Radiation

• Microwave

The amount of mass in a given volume of a substance known as __________.

• density

• mass

• weight

• temperature