Conductors and Insulators

Why is copper often used to line the bottom of cookware?

• Copper cools quickly.

• Copper is inexpensive.

• Copper is a good insulator.

• Copper is a good conductor.

Tags

NGSS.MS-PS3-3

Which best explains why a metal ice cream scoop works more efficiently than a plastic ice cream scoop when dipped in warm water prior to scooping the ice cream?

• The metal heats more quickly than the plastic.

• The plastic heats more quickly than the metal.

• The metal insulates against heat.

• The plastic conducts heat.

Tags

NGSS.MS-PS3-3

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.

• Metal is natural and inexpensive.

Tags

NGSS.MS-PS3-3

Which container used for cooking food would best conduct heat?

• a container made of foam

• a container made of glass

• a container made of metal

• a container made of plastic

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NGSS.MS-PS3-3

NGSS.MS-PS3-4

How do a wooden spoon and a metal spoon react when placed into a pot of hot soup?

• Neither spoon gets hot because heat does not transfer through metal or wood.

• Both spoons will quickly become hot because heat transfers through all materials equally.

• The metal spoon gets hot sooner because heat transfers more easily through metal than wood.

• The wooden spoon gets hot sooner because heat transfers more easily through wood than metal.

Tags

NGSS.MS-PS3-4

Why do asphalt streets often have cracks in them?

• because asphalt is a good conductor of heat

• because asphalt expands when heated and contracts when cooled

• because asphalt is an insulator that helps keep heat from escaping

• because asphalt contracts when heated and expands when cooled

Tags

NGSS.MS-PS3-4

Why does ice cream placed in a plastic cooler melt slower than ice cream placed in a metal pot?

• because metal is a better insulator than plastic

• because plastic is a better insulator than metal

• because metal insulates against more heat

• because plastic conducts more heat

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which best explains why food is heated in metal pans?

• The metal will melt and the food will burn.

• The metal insulates the food from the heat.

• The metal reduces the heat until the food freezes.

• The metal will heat well so the food will cook evenly.

Tags

NGSS.MS-PS3-3

Which explains how most metals react to being heated?

• They become brittle.

• They contract.

• They expand.

• They break.

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NGSS.MS-PS1-4

Which best explains why it is a bad idea to use metal chairs for a party on a hot sunny day?

• The metal chairs melt slowly.

• The metal chairs remain cold.

• Metal chairs are very heavy.

• Metal chairs get hot quickly.

Tags

NGSS.MS-PS3-4

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