Heat Transfer
Heat Transfer Continued
Conductors and Insulators
Conductors and Insalators /Expansion & Contraction
Extra Questions
100
A cold metal spoon is placed in a bowl of hot soup. Which best describes how the spoon is affected?
A. The heat from the soup does not affect the temperature of the spoon.
B. The heat from the soup is conducted through the spoon, making the spoon warmer.
C. The cold air in the room radiates into the soup, cooling it, and keeping the spoon cool.
D. The cold from the spoon is conducted into the soup, causing the soup to cool to the same temperaure as the spoon.
B. The heat from the soup is conducted through the spoon, making the spoon warmer.
100
A man is heating up his dinner over a campfire. Why is the man wearing gloves.
A. Metal conducts heat, so the man could burn his hand.
B. Metal radiates heat, so the man could burn his hand.
C. Metal is helping light energy pass to the man's hand.
D. Metal is helping chemical energy pass to the man's hand.
A. Metal conducts heat, so the man could burn his hand.
100
1. Which best explains what happens to most materials when they are heated?
A. They expand.
B. They contract.
C. They change color.
D. They double in size.
A. They expand.
100
Mrs. Warren is giving her class an ice cream party. She needs to keep the ice cream cool until lunchtime. Which would be the best container for storage?
A. uncovered aluminum pot
B. covered foam box
C. white fabric bag
D. brown paper bag
B. covered foam box
100
An unlit candle was laid on a table directly in front of a hot fireplace. Which most likely explains why the candle melted?
A. Heat energy from the fire was radiated through the air into the candle.
B. Heat energy from the fire was conducted through the table into the candle.
C. Heat energy from the fire was radiated through the floor into the candle.
D. Heat energy from the fire was conducted through the air into the candle.
A. Heat energy from the fire was radiated through the air into the candle.
200
Ice cubes are placed in a glass of water that is at room temperature. Which statement best describes the temperature of the water after 10 minutes?
A. The temperature decreases because some of the water's heat is lost to the ice.
B. The temperature decreases because some of the ice's heat is lost to the water.
C. The temperature increases because some of the coolness of the water is absorbed by the ice.
D. The temperature increases because some of the coolness of the ice is absorbed by the water.
A. The temperature decreases because some of the water's heat is lost to the ice.
200
Which is an example of heat being transfered by conduction?
A. a furnance heating the air in a school
B. an ice cube mealting in a person's hand
C. a pot of water on a stove boiling
D. the sun heating water in a swimming pool
B. an ice cube mealting in a person's hand
200
What happens to metal railroad tracks during the heat of a summer day?
A. decrease in weight
B. increase in weight
C. decrease in length
D. increase in length
D. increase in length
200
Which best explains why the handles of many cooking pans are made of plastic?
A. Plastic melts easily.
B. Plastic freezes easily.
C. Plastic is a good conductor of heat.
D. Plastic is a poor conductor of heat.
D. Plastic is a poor conductor of heat.
200
Lee is making simple syrup by dissolving sugar into water. Which action will most likely cause the sugar to dissolve more quickly?
A. heating the water
B. cooling the water
C. increasing the amount of sugar
D. decreasing the amount of water
A. heating the water
300
Tina is boiling water in a metal pot for a weather experiment. What is most likely the reason she would need to use a pot holder for moving the metal pot?
A. Radiation causes the pot to be hot.
B. Conduction causes the pot to be hot.
C. Convection causes the pot to be hot.
D. Transpiration causes the pot to be hot.
B. Conduction causes the pot to be hot.
300
Which best explains how convected heat causes a hot air balloon to stay in the air?
A. The heat is falling and replacing cooler air.
B. The heat is produced from the rising of air currents.
C. The heat is absorbed through the balloon from the sun.
D. The heat is rising and circulating , causing the balloon to stay up in the air.
D. The heat is rising and circulating , causing the balloon to stay up in the air.
300
A plastic bottle of water was placed into a freezer. The next day the bottle was taken out of the freezer. What has most likely happened to the water and the plastic bottle?
A. The water changed to a gas, and the bottle shrunk.
B. The water changed to a solid, and the bottle expanded.
C. The water changed to a gas, and the bottle was empty.
D. The water changed to a solid, and the bottle was not changed.
B. The water changed to a solid, and the bottle expanded.
300
It was very sunny outside, and Mike wanted to wear a shirt that would keep him cool. Which color shirt would be best for Mike to wear?
A. black
B. white
C. red
D. multi-colored
B. white
300
Which best explains why the sun’s rays will warm a lake?
A. conduction
B. convection
C. radiation
C. radiation
400
When Julie was cooking macaroni she noticed that it would rise to the top of the boiling water and then sink back to the bottom of the pot. This is most likely because
A. The convection of heat within the water was creating acurrent.
B. The convection of air around the pot was creating a current.
C. The conduction of heat within the water was creating acurrent.
D. The conduction of air around the pot was creating a current.
A. The convection of heat within the water was creating acurrent.
400
A student places a cup of cold water on a counter in a hot room. After a short time, the student notices that the water in the cup is no longer cold. Which best explains why the water in the cup is no longer cold?
A. The coldness of the water transferred to the air, making the water in the cup warmer.
B. The coldness of the water was conducted to the cup, making the water in the cup warmer.
C. The heat from the air transferred to the water in the cup, making the water in the cup warmer.
D. The heat from the air caused the cold water in the cup to condense, making the water warmer.
C. The heat from the air transferred to the water in the cup, making the water in the cup warmer.
400
On a hot day in the sun, why does Robert use a foam can holder to keep his drink cool?
A. Foam insulates the cold drink.
B. Foam reflects cold air from the can.
C. Foam reflects heat from the sun off the can.
D. Foam conducts heat between the can and the air.
A. Foam insulates the cold drink.
400
Which is the best conductor of heat?
A. a glass tube
B. a copper wire
C. a piece of string
D. a piece of wood
B. a copper wire
400
Which best explains why there are gaps between the concrete sidewalks?
A. When temperatures get cold, the gaps allow the concrete to expand without cracking.
B. When temperatures get cold, the gaps allow the concrete to contract without cracking
C. When temperatures get hot, the gaps allow the concrete to expand without
cracking.
D. When temperatures get hot, the gaps allow the concrete to contract without
cracking.
C. When temperatures get hot, the gaps allow the concrete to expand without
cracking.
500
Although the heat source is at the bottom of the beaker, all of the water is the same temperature.
What keeps the water at the top of the beaker the same temperature as that of the bottom?
A. Heat from the burner radiates through the liquid and causes even heating.
B. Evaporation heats the water at the top and the flame heats the water at the bottom.
C. The walls of the beaker reflect heat toward the center, so the water heats evenly.
D. Heated water molecules and steam rise in the beaker, carrying heat by convection.
D. Heated water molecules and steam rise in the beaker, carrying heat by convection.
500
On a hot summer day, a student dropped an ice cube onto a park bench. Within minutes, the ice cube melted. Which best describes the process the student observed?
A. radiation
B. combustion
C. conduction
D. convection
C. conduction
500
Joann fries an egg each morning in a metal frying pan with a rubber-coated handle. Which best explains why the handle of the frying pan is coated with rubber?
A. Rubber makes the pan lighter.
B. Rubber makes the pan prettier.
C. Rubber is cheap to manufacture.
D. Rubber is a poor conductor of heat.
D. Rubber is a poor conductor of heat.
500
12.A family living on the top floor of a tall building complains that their home gets too hot during the day. Which could they add to the roof to allow their home to stay cooler?
A. black metal
B. white metal
C. black rubber
D. white rubber
D. white rubber
500
Which would make the best roof material for a miniature solar oven used to cook meat?
A. cement
B. glass
C. paper
D. wood
B. glass