Heating and Cooling of Materials

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 enexpensive

Tags

NGSS.MS-PS3-3

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?

• metal heats more quickly than the plastic

• plastic heats more quickly than the metal

• metal insulates against heat

• plastic conducts heat

Tags

NGSS.MS-PS3-3

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-PS1-4

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-PS1-4

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.

• 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

NGSS.MS-PS3-4

Which explains how most metals react to being heated?

• they become brittle

• they contract

• they expand

• they break

Tags

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-PS3-3

NGSS.MS-PS3-4

Manuel was having trouble opening a new glass jar of pickles. His father told Manuel to hold the metal lid of the jar under running hot water for a few seconds, then try again. Then the lid opened easily. What is the MOST likely reason Manuel’s father suggested using hot water to loosen the lid?

• Glass contracts when it is heated.

• Metals expand when they are heated.

• Metals are easier to grip when they are warm.

• Hot water reduces friction between metal and glass.