Energy Unit Review

Which of the following heat exchange processes involves the collision of particles?

• insulation

• conduction

• convection

• radiation

Why does a floor covered with tile feel colder than a floor covered with carpet?

• The tile floor is colder than the carpet.

• The tile floor conducts heat better than the carpet.

• The carpet conducts heat better than the tile floor

• The tile floor is a better insulator than the carpet.

An electric hotplate is used to cook food in an all-metal frying pan.

Which best shows the path of the conduction of thermal energy?

• Pan-Coil

• Coil-Pan-Meat

• Meat-Pan-Handle

• Handle-Coil

Kinetic energy is

• when two objects push or pull on each other

• the energy of motion

• when a warm object is in contact with a cooler one

• the average kinetic energy due to the motion of the atoms in a substance

Which of the following statements about thermal energy is true?

• thermal energy will transfer only through radiation

• thermal energy will transfer only if there are liquids involved

• thermal energy will always transfer from the cooler object to the warmer object

• thermal energy will always transfer from the warmer object to the cooler object

Heat transferred by the circulation or movement of fluids

• conduction

• convection

• radiation

• insulator

Heat transferred through matter or empty space by electromagnetic waves; no direct contact is needed

• radiation

• conduction

• convection

• reflection

An increase in the size of a substance due to an increase in the temperature of a substance

• thermal equilibrium

• thermal expansion

• thermal energy

• thermal equation

How does the color of an object affect the amount of energy it receives from sunlight?

• Light colored objects reflect more light and become warmer than darker objects.

• Light colored objects absorb more light and become warmer than darker objects.

• Dark colored objects reflect more light and become warmer than lighter objects.

• Dark colored objects absorb more light and become warmer than lighter objects.

What is the effect of absorption of ultraviolet light by human skin?

• sunburn on the skin surface

• feeling of warmth on the skin

• disinfection of the skin tissues

• reflection of UV light