Heat Transfer and Molecular Motion

Multiple Choice

What is the definition of CONDUCTION?

• When heat is transferred from objects like rays of light or electromagnetically.

• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.

• When heat transfers from objects that are touching.

• When heat transfers through the heater or AC in your house.

Multiple Choice

What is the definition of CONVECTION

• When heat transfers through waves.

• When heat transfers from objects that are touching.

• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.

• Heat traveling from the sun

Multiple Choice

Molecules are always ____________________ (with the exception of absolute zero). 

• in motion

• frozen

Multiple Choice

How is heat transferred?

• From a cooler object to a warmer object.

• From a warmer object to a cooler object

Multiple Choice

___________________ is the measure of kinetic energy of particles. 

• A thermometer

• Expansion

• Farenheit

• Temperature

Multiple Choice

Molecules move _______ when thermal energy is added to a solid, liquid, or gas. 

• freely 

• quickly

• in slow motion 

Multiple Choice

Which will most likely occur when raw egg is placed on black pavement on a hot, summer day?

• The pavement will conduct the heat and cook the egg.
• The egg will reflect the heat and make the pavement hotter underneath.
• The egg will absorb the heat  and leave the pavement hotter underneath.
• The pavement will absorb the heat from the egg, and the egg will stay raw.

Multiple Choice

Jordan places a hot spoon into a container of ice cream. How does this help him scoop  out the ice cream? 

• The coolness from the ice cream is conducted to the spoon making it easier to scoop out.
• The coolness from the ice cream is radiated to the spoon making it easier to scoop out.
• The warmth of the spoon is conducted to the ice cream  making it easier to scoop out.
• The warmth of the spoon is radiated  to the ice cream making it easier to scoop out.

Multiple Choice

Which describes what can happen as a result of radiation?

•  A piece of wood burns in a fire.

• A shirt is hot after having been  ironed.

• A can of soup is heated in a pot on a stove.

• A car’s inside temperature rises  to over 100 degrees on a sunny day.

Multiple Choice

What does temperature measure?

• Heat of Molecules

• ºC

• Average Kinetic Energy of Molecules

• Thermal Energy

Multiple Choice

How does heat flow?

• Always from cold to warm

• Always from warm to cold

• Both warm to cold & cold to warm

• It depends on the temperature

Multiple Choice

John put a heat pack on his cold feet. What will most likely be the result?

• The cold from John’s feet will  be radiated into  the heat pack.

• The warmth of the heat pack will be radiated  onto John’s feet.

• The cold from John’s feet will be conducted  into the heat pack.

• The warmth of the heat pack will be conducted  onto John’s feet.

Multiple Choice

The amount of energy required to raise the temperature 1ºC for every kilogram is called____?

• Thermal Energy

• Specific Heat

• Temperature

• Kinetic Energy

Multiple Choice

Which best describes the process of convection?

• Convection is the primary way  heat travels  through rays.
• Convection is the primary way heat travels  through metals.
• Convection is the primary way heat travels  through appliances.
• Convection is the primary way heat travels  through liquids and gasses.

Multiple Choice

Tom puts a metallic cover over his car’s windshield after parking. How does this control  the sun’s rays  during a sunny day?

• It prevents heat energy from leaving the car.

• It controls the temperature by providing shade.

• It reflects the sun’s rays away from the windshield.

• It absorbs heat in the windshield  protector and  cools the car.

Multiple Choice

How is heat transferred when boiling a pot of water on the stove?

• conduction

• convection

• combustion

• radiation

Multiple Choice

Which is an example of heat being transferred by conduction?

• a furnace heating the air in a school

• an ice cube melting in a person’s hand

• a pot of water on a stove boiling

• the sun heating water in a swimming pool

Multiple Choice

Which best explains how bacon is fried on a stove burner?

• The bacon creates a convection current, the  heat rises to the pan, and then rises to the stove burner.

• The bacon transfers heat directly to the pan, and the pan transfers heat directly to  the stove burner.

• The stove burner radiates heat to the pan,  and the pan radiates heat to the bacon.

• The stove burner transfers heat directly  to the pan, and the pan directly  transfers heat to the bacon.

Multiple Choice

What unit do you use to measure Thermal Energy?

• J/Kg ºC

• Kg

• ºC

• J

Multiple Choice

What is the symbol for Thermal Energy?

• Q

• t

• m

• C

Multiple Choice

The amount of energy required to raise the temperature 1ºC for every kilogram is called____?

• Thermal Energy

• Specific Heat

• Temperature

• Kinetic Energy

Multiple Choice

Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using the same thermal energy.  What material would be the coolest after being heated?

• Copper

• Carbon Steel

• Zinc

• Stainless Steel

Multiple Choice

_______________ describes how much energy is required to raise an object's temperature.

• Conduction

• Convection

• Specific Heat

• Radiation

Multiple Choice

___________ is measured by the unit Joules.

• Heat energy

• Temperature

• Specific heat