5ENERGYEOG

What conditions are necessary for heat conduction to occur between two objects?

• The objects must be surrounded by air or water.

• Two objects at different temperatures are touching one another.

• Two objects at different temperatures are located close to one another.

• One object must emit energy as light and heat and another object absorbs the energy.

Michele wants to roast marshmallows over a fire. Which best explains how this process happens?

• The warmth of the fire is conducted into the marshmallow.

• The warmth of the fire is radiated into the marshmallow.

• The coolness of the marshmallow is conducted into the fire.

• The coolness of the marshmallow is radiated into the fire.

Jake is wearing gloves while he gets a hot pan out of the oven. Which BEST explains why Jake needs to wear gloves while he is carrying the hot pan?

• The gloves protect his hands from convection heat in the hot pan.

• The gloves protect his hands from heat that is radiated through the hot pan.

• The gloves protect his hands from heat that is conducted through the hot pan.

• The gloves protect his hands from heat that enters the pan from the surrounding air.

Which best explains how Earth’s climate is impacted by convection?

• Convection helps move thermal energy around the Earth.

• Convection helps cool the Earth and the atmosphere around it.

• Convection continuously pumps cool energy through the oceans.

• Convection stops the flow of cool air and maintains warm weather.

A man is heating up his dinner over a campfire as shown below.

Why is the man wearing gloves?

• Metal conducts heat, so the man could burn his hand.

• Metal radiates heat, so the man could burn his hand.

• Metal is helping light energy pass to the man’s hand.

• Metal is helping chemical energy pass to the man’s hand.

Uneven heating of Earth causes convection currents.

What part of this process is being demonstrated in this diagram?

• Heat causes gases to expand.

• Heat causes gases to contract.

• As air cools, currents flow clockwise.

• As air cools, currents flow counterclockwise.

Which would be the best way to change a solid to a liquid?

• freeze it

• heat it

• heat it, then freeze it

• freeze it, then heat it

Plastic does not conduct heat like many metals. Which product made from plastic best takes advantage of this characteristic?

• table

• a cooler

• bucket

• hairbrush

Dylan will be hiking on a sunny day. What type of container should he store his water in if he wants it to stay cold?

• a metal bottle, because metal radiates heat

• a metal bottle, because metal easily conducts heat

• a thick plastic bottle, because plastic conducts heat

• a thick plastic bottle, because plastic does not easily conduct heat

Joe is spreading butter on a piece of toast. Which type of butter would Joe most likely use?

• butter from the oven

• butter from the freezer

• butter from the counter top

• butter from the refrigerator