HEAT!

Insulators

100

Most oven mitts are made out of cotton. Which of the following best explains why Raymond uses oven mitts when handling the hot dish of food?

1. Cotton is a poor conductor of heat
2. Cotton is a good conductor of heat
3. Cotton uses electrical properties to repel heat
4. Cotton uses magnetic properties to repel heat

A. Cotton is a poor conductor of heat

200

Landon is cooking some chili on the stove. What type of spoon is Landon most likely using to keep from burning his hand when he touches the spoon?

1. copper
2. iron
3. steel
4. wood

Wood

300

Denise wears a pair of fleece mittens to keep her hands warm. Which of the following explains why the fleece keeps the cold away from Denise’s hands?

1. The fleece is a human-made material, so it heats up.
2. The fleece produces its own heat.
3. The fleece acts as an insulator.
4. The fleece acts as a conductor.

 

C. The fleece acts as an insulator.

400

Marvin is making a bowl of macaroni. He wants to put the macaroni in a container to keep it warm. Which of the following would be the best material for this container?

A. plastic material

B. glass material

C. foam material

D. wax material

 

Foam material 

Conductors

100

Some materials conduct heat well and some materials conduct heat poorly.  Which of these materials is the best conductor of heat?

1. glass
2. metal
3. water
4. wood

Metal

200

Some materials conduct heat well and some materials conduct heat poorly.  Which example best demonstrates the process of conduction?

1. Sunlight brightens a dark room.
2. A piece of paper is torn in half.
3. Warmed air rises above a lit candle.
4. A metal spoon gets warm when used to stir hot soup.

D. A metal spoon gets warm when used to stir hot soup.

300

Yolanda wants to find out which material is the best conductor of heat. She puts thermometers in four cups of hot water. Each thermometer starts at 20°C (68°F). After 15 minutes, she checks the temperatures.

Which cup will most likely make the thermometer’s temperature change the fastest?

1. foam cup
2. paper cup
3. plastic cup
4. aluminum cup

Aluminum cup

400

Oscar is investigating good insulators of heat.  He wraps thermometers in four different kinds of material.  Then he puts the wrapped thermometers out on a sunny asphalt playground. One hour later, he observes and records the temperatures. 

Which of the materials will Oscar most likely say is NOT a good insulator of heat?

1. aluminum
2. cardboard
3. cork board
4. rubber

 

Aluminum

Heat

100

A cook uses a metal spoon to stir soup on a stove. The spoon gets hot.  What path does the heat follow?

1. stove → pan → soup → spoon
2. stove → soup → pan → spoon
3. stove → pan → spoon → soup
4. stove → spoon → pan → soup

Stove, pan, soup, spoon (A)

200

Dev places an unknown object on top of a block of ice.  After three minutes he observes the ice melting.  Which claim best supports Dev’s observation?

1. The unknown object is the same temperature as the block of ice
2. The unknown object is warmer than the block of ice
3. The unknown object is cooler than the block of ice
4. The unknown object is larger than the block of ice  

 

B. The unknown object is warmer than the block of ice

300

Diane’s metal spoon felt cold when she picked it up from the table. She put the spoon into her bowl of hot soup. When she tasted the soup, the spoon felt hot in her mouth.

What best explains why the temperature of the spoon changed?

1. The cold from the metal spoon changed the temperature of the hot soup.
2. The heat from the metal spoon changed the temperature of the hot soup.
3. The heat from the bowl of soup changed the temperature of the metal spoon.
4. The cold from the air in the room changed the temperature of the metal spoon.

C. The heat from the bowl of soup changed the temperature of the metal spoon.