Thermal Energy Transfer

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

Unlike conduction or convection, radiation is a method of thermal energy transfer that can move in electromagnetic waves -

• through empty space.

• when objects touch.

• only through solids.

• in the motion of fluids.

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A student places a cup of cold water on a counter in a hot room. After a short time, the student notices that the water in the cup is no longer cold. Which best explains why the water in the cup is no longer cold?

• The coldness of the water transferred to the air, making the water in the cup warmer.

• The coldness of the water was conducted to the cup, making the water in the cup warmer.

• The heat from the air transferred to the water in the cup, making the water in the cup warmer.

• The heat from the air caused the cold water in the cup to condense, making the water warmer.

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Heat

Ms. Sandoval has a pot of boiling water and a wooden spoon, a plastic spoon, a metal spoon, and a glass spoon. If the four spoons of different materials were placed in a pot of boiling water, which spoon’s handle would heat up the fastest?

• the wooden spoon

• the plastic spoon

• the metal spoon

• the glass spoon

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Why are pots used for cooking made of metal?

• Metal is an excellent conductor of heat.

• Metal makes the handle look attractive.

• Metal is a poor conductor of heat.

• Styrofoam should be used

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Why does a plastic straw in a hot cup of coffee feel cooler than a metal straw in a hot cup of coffee?

• the plastic straw is a better conductor of heat

• the metal straw is a better conductor of heat

• the metal straw has a smoother surface

• plastic can never get hot

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Why are most cooking pots in Noah's kitchen made of metal?

• Metal is a good conductor allowing heat to be distributed around the food.

• Metal helps food hold onto its flavors more by trapping molecules.

• Any other material would not withstand the heat.

• Other materials may be too light and flimsy causing the food to burn.

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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.

Warming your body when standing near a campfire is an example of what type of heat transfer?

• conducton

• convection

• radiation