Unit 2- Thermal Electrical Energy Review

My dad is cooking on the grill. Standing close to it, he feels the heat. Lifting the lid, the temperature decreases & smoke goes up. A steak is placed on the grill to cook. Which correctly lists the order of heat transfer types?

• radiation, convection, and conduction

• convection, radiation, and conduction

• conduction, convection, and radiation

• radiation, conduction, and convection

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6.P.3.1

A microwave oven produces radiation that transfers to water, which then causes the temperature of the water to increase. What effect does the radiation have on the water molecules?

• The radiation caused the water molecules’ mass to increase.

• The radiation caused the water molecules’ mass to decrease.

• The radiation caused the water molecules’ motion to increase.

• The radiation caused the water molecules’ motion to decrease.

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6.P.3.2

What type of energy transfer occurs when warm air moves upward and cooler air descends?

• conduction

• convection

• radiation

• solar

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6.P.3.1

Which statement explains why a stove cools down after being turned off?

• The energy from the stove disappears and is not transferred to the environment.

• The environment transfers energy to the stove until they are the same temperature.

• The stove transfers energy to the environment until they are the same temperature.

• The stove and environment transfer energy to each other until they are the same temperature.

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6.P.3.1

What happens when sunlight hits a dark-colored jacket?

• The jacket will reflect sunlight, and some of the reflected sunlight will be converted into heat.

• The jacket will absorb sunlight, and some of the absorbed sunlight will be converted into heat.

• The jacket will reflect sunlight, and some of the reflected sunlight will be converted into electricity.

• The jacket will absorb sunlight, and some of the absorbed sunlight will be converted into electricity.

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6.P.3.2

Which statement best explains why grass appears green during summer?

• The grass absorbs green light.

• The grass produces green light in its cells.

• The grass uses green light to make food in its cells.

• The grass reflects green light and absorbs other colors.

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6.P.3.2

Why would an electrician want to use copper wiring?

• Copper is a good conductor of heat and electricity.

• Copper cools more slowly than iron.

• Copper is easy to install.

• Copper is inexpensive.

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6.P.3.3

Why would an electric circuit not produce electricity if the connections were made with rubber bands instead of metal wiring?

• Rubber does not conduct heat.

• Rubber does not insulate heat.

• Rubber does not conduct electricity.

• Rubber would not stretch around the connections.

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6.P.3.3

What happens to the density of a material when it expands?

• Density increases.

• Density decreases.

• Density remains the same.

• Density becomes zero.

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6.P.3.3

Jillian and Kobe need to choose a material for the wires in their model car. Which material is best for conducting electricity?

• metal

• rubber

• glass

• ceramic

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6.P.3.3