How Does Heat Move?
Which BEST describes the the flow of heat?
a. From a larger object to a smaller object.
b. From a cooler object to a warmer object.
c. From a warmer object to a cooler object.
d. From a smaller object to a larger object.
c. From a warmer object to a cooler object.
Which is the best example of heat transfer by convection?
a. frying bacon in a pan
b. a hot air balloon rising
c. melting ice in your hand
d. burning your finger on the stove
b. a hot air balloon rising
Handles on metal pans are often coated with plastic. What is the most likely reason for this?
a. Plastic is a good conductor of heat
b. Plastic is a poor conductor of heat
c. Metal is a poor conductor of heat
d. Metal and plastic are good conductors of heat
b. Plastic is a poor conductor of heat
Which of the following is an example of a physical change?
a. fruit rotting
b. rusting of iron
c. breaking a glass
d. baking a cake
c. breaking a glass
Corey is performing an experiment. He adds 1 gram of baking soda to 5 grams and water and stirs. Corey watches as the baking soda dissolves in the water. If Corey weighs the water and baking soda solution, what will its mass be?
a. 4 grams
b. 5 grams
c. 6 grams
d. 7 grams
c. 6 grams
A hot ice cream scoop is placed into a container of ice cream. How does the heat flow in this example?
a. The coolness of the ice cream is conducted into the hot spoon.
b. The coolness of the ice cream is radiated to the hot spoon.
c. The warmth of the spoon is conducted into the ice cream.
d. The warmth of the spoon is radiated to the ice cream.
c. The warmth of the spoon is conducted into the ice cream.
A pot is heated on a stove. Which process causes the metal handle of the pot to also become hot?
a. combustion
b. convection
c. radiation
d. conduction
d. conduction
What happens to metal railroad tracks during the heat of a summer day?
a. Decrease in length
b. Increase in weight
c. Decrease in weight
d. Increase in length
d. Increase in length
Which is an example of a different substance being formed?
a. glass breaking
b. metal melting
c. water freezing
d. wood burning
d. wood burning
The Riley family went on vacation and left 3 grams of milk in their refrigerator. The milk began to spoil, and there were lumps in it when the Rileys' returned home. Which is most likely the mass of the spoiled milk?
a. 3 grams
b. 4 grams
c. 5 grams
d. 2 grams
a. 3 grams
Stirring a cup of hot tea causes a metal spoon to get warm. Which statement best explains why the spoon gets warm?
a. Heat energy transfers from the metal spoon to the hot liquid.
b. Heat energy transfers from the hot tea to the spoon.
c. Heat energy transfers from the air to the hot liquid, and then to the spoon.
d. Heat energy transfers from the hot liquid to the cup, and then to the spoon.
b. Heat energy transfers from the hot tea to the spoon.
Which is the best example of the transfer of heat by radiation?
a. water boiling
b. ice melting
c. hot air balloon rising
d. a lightbulb glowing
d. a lightbulb glowing
Chloe was cooking a hot pot of chili. Why should she use a wooden spoon to stir the chili?
a. Wood is a good conductor and allows thermal energy to move to the spoon from the chili.
b. Wood is a poor conductor that allows thermal energy to move from the chili to the spoon.
c. Wood is a good conductor that does not allow the thermal energy to move from the chili to the spoon.
d. Wood is a poor conductor and it does not allow the thermal energy from the chili to move to the spoon quickly.
d. Wood is a poor conductor and it does not allow the thermal energy from the chili to move to the spoon quickly.
Which is the best example of a new substance forming?
a. lighting a match
b. cutting a piece of paper
c. popping a balloon
d. hitting a nail with a hammer
a. lighting a match
Logan boiled 150 grams of water until it evaporated and turned to water vapor. What is true about the water vapor?
a. It has the same volume as the liquid water.
b. Its mass is more than the liquid water.
c. Its mass is less than the liquid water.
d. It has the same mass as the liquid water.
d. It has the same mass as the liquid water.
Which best explains how ice melts in a person’s hand?
a. The heat from a person’s hand transfers by radiation to the ice, causing it to melt.
b. The heat from a person’s hand transfers by conduction to the ice, causing it to melt.
c. The cool temperature of the ice transfers by radiation to a person’s hand, cooling it off.
d. The cool temperature of the ice transfers by conduction to a person’s hand, cooling it off.
b. The heat from a person’s hand transfers by conduction to the ice, causing it to melt.
Touching the icy cold window on the bus is an example of which heat transfer process?
a. Condensation
b. Conduction
c. Convection
d. Radiation
b. Conduction
Which best explains why a full glass bottle of water should not be stored in a freezer?
a. The temperature of the freezer will make the water too cold.
b. Water expands when it freezes, which could break the bottle.
c. Water contracts when it freezes, which could break the bottle.
d. The temperature of the freezer will not make the water cold enough.
b. Water expands when it freezes, which could break the bottle.
Which of the following is an example of the formation of a new substance?
a. towel drying
b. crayons melting
c. apple rotting
d. ice melting
c. wood burning
A teacher is demonstrating chemical changes to her students. She mixes 50 grams of chemical A and 60 grams of chemical B in a sealed beaker. They mix together to create a reaction that creates a gas and a liquid. The gas has a mass of 70 grams. What is the mass of the new liquid?
a. 40 grams
b. 50 grams
c. 60 grams
d. 70 grams
a. 40 grams
Why does an ice cube melt when dropped into hot liquid?
a. The liquid absorbs heat from the ice.
b. Heat from the liquid transfers to the ice.
c. Heat from the ice transfers to the liquid.
d. Cold from the ice transfers into the liquid.
b. Heat from the liquid transfers to the ice.
Which heat transfer process allows ocean currents in the global conveyor belt-like the gulf stream-to transfer heat around the globe and is responsible for the formation of land and sea breezes?
a. radiation
b. condensation
c. convection
d. conduction
c. convection
Firefighters can work in situations where temperatures can be extremely high. How do the suits firefighters wear protect them from these hot temperatures?
a. A firefighter’s suit is made of insulating materials that slow the movement of heat.
b. A firefighter’s suit is made of good conductors that move heat easily.
c. A firefighter’s suit is made to absorb all surrounding heat.
a. A firefighter’s suit is made of insulating materials that slow the movement of heat.
Which change is most likely to produce a new substance?
a. curds and lumps forming in spoiled milk
b. sugar dissolving into water
c. glass breaking into many pieces
d. water boiling and creating steam
a. curds and lumps forming in spoiled milk
Logan decided to boil a pot of water to make mac-n-cheese. When he first started boiling the water, the pot contained 800 ml of water. After 15 minutes, the pot contained 650 ml of water. What happened to the water in the pot?
a. 150 ml of the water was destroyed during the boiling process
b. The water gained mass as it was absorbing heat
c. 150 ml of the water changed into water vapor which rose into the air
d. The water contained salt that evaporated out
c. 150 ml of the water changed into water vapor which rose into the air