Thermal Energy1

Which is the meaning of conduction

• Transfer of heat between substances that are in direct contact

• Transfer of heat in substances

• Transfer of heat

• Transfer of particles that are in direct contact

Which is the meaning of convection

• Down movements of gases and liquids caused by heat transfer

• Up movements of gases and liquids caused by heat transfer

• Up and down movements of gases and liquids caused by heat transfer

• Across movements of liquids and gages caused by heat transfer

Heat transfer occurs

• in many directions

• both from warm objects to colder ones and from cold objects to warmer ones

• only from warmer objects to colder ones

• only from cold objects to warmer ones

A measure of the average kinetic energy of the individual particles in an object is called

• thermal energy

• conduction

• convection

• temperature

Which of these is an example of convection?

• Standing on a hot metal bridge

• The air near the ceiling is warmer than the air near the floor

• The Sun heating the Earth

• Touching hot sand with your feet

The transfer of thermal energy through electromagnetic waves is called ______

• conduction

• convection

• radiation

The transfer of thermal energy through a substance by direct contact or touch is called___.

• conduction

• insulation

• convection

• radiation

Thermal energy ALWAYS moves from _____ to _____.

• solid to liquid
• ice to water
• hot to cold
• solid to gas

Which of the following is an example of conduction?

• Solar energy warming a room.
• Heat rising from the coils of a stove.
• Hot air drying a wet towel.
• Heat moving from a clothes iron to a shirt.

Why do gases or liquids rise when they are heated?

• particles move faster, expand, and become more dense

• particles move faster, expand, and become less dense

• particles move slower, come closer together, and become less dense

• particles move slower, come closer together, and become more dense.