AC Thermal Energy Study Guide
AC Thermal Energy Study Guide
1)The method of heat transfer by which the sun warms the earth is
A) / conductionB) / convection
C) / radiation
D) / solaration
2)The process by which hot and cold air are transferred in the atmosphere is
A) / conduction.B) / convection.
C) / insulation.
D) / radiation.
3)A new type of oven that cooks food quickly and more completely is the convection oven. The key difference in this type of oven and a regular oven is that it
A) / circulates the hot air.B) / cooks at higher temperatures.
C) / irradiates the food at the same time.
D) / sends heat from the inside of the food to the outside.
4)Microwave ovens heat food through the process of
A) / conduction.B) / convection.
C) / radiation.
D) / stratification.
5)The sun heats Earth mainly through
A) / fusion.B) / radiation.
C) / conduction.
D) / convection.
6)What is the main method of heat transfer from the core to the crust of Earth?
A) / conductionB) / convection
C) / insulation
D) / radiation
7)
The heat transfer depicted in the image is MOST likely
A) / circulation.B) / conduction.
C) / convection.
D) / radiation.
8)Which diagram BEST represents a convection heating current?
A) /B) /
C) /
D) /
9)Heat from the sun moves through space by the process of
A) / circulation.B) / conduction.
C) / convection.
D) / radiation.
10)
This process of heat transfer by conduction would NOT work
A) / in space.B) / in a solid.
C) / under water.
D) / in the atmosphere.
11)The process of heat radiation is the ONLY method of heat transfer that can occur
A) / under water.B) / through space.
C) / through the air.
D) / through a solid.
12)
This process of heat transfer is BEST described as
A) / condensation.B) / conduction.
C) / convection.
D) / radiation.
13)Two iron rods are placed horizontally, touching end-to-end. One end of one rod is heated. After some time, the other rod also feels warm to touch. How did the heat travel from the heated rod to the one that was not heated?
A) / The air over the heated rod traveled to the other rod and made it warm.B) / Part of the heat was converted to radiation and traveled to the cooler rod.
C) / Electrons within the rods started moving, distributing heat consistently in both rods.
D) / The molecular movement in the first rod transferred energy to the molecules in the second.
14)
When mantle rocks near the radioactive core are heated, they become less dense than the cooler, upper mantle rocks. These warmer rocks rise, while the cooler rocks sink. This movement of warmer and cooler mantle rocks creates pockets of circulation within the mantle called ______, which are thought to be the force behind the movement of tectonic plates over the asthenosphere.
A) / magma flowsB) / density cells
C) / convection cells
D) / conduction points
15)Heat would best be transferred by conduction between
A) / a candle and the air.B) / an oven and a glass dish.
C) / a stove and a copper pot.
D) / water and a wooden spoon.
16)Conduction occurs more easily between solids and liquids. This is because the particles in gases are
A) / farther apart and move faster.B) / closer together and move faster.
C) / further apart and move more slowly.
D) / closer together and move more slowly.
17)The name for heat transfer between two solids which are in direct contact or touching one another is
A) / conduction.B) / convection.
C) / insulation.
D) / radiation.
18)Molecules of two solid substances actually collide with each other to transfer energy in this method of heat transfer.
A) / conductionB) / convection
C) / insulation
D) / radiation
19)When ironing clothes, the primary method of heat transfer is
A) / conduction.B) / convection.
C) / insulation.
D) / radiation.
20)Why does a metal spoon left on a bowl of hot soup become warm?
A) / Metal is a conductor.B) / Metal is an insulator.
C) / Metal produces its own heat.
D) / Metal heats up from magnetism.
21)Which material would be BEST to use for heating up food?
A) / aluminumB) / ceramic
C) / foam
D) / plastic
22)Marina is cooking soup in a pot on the stove. The pot is in direct contact with the stove. In this case, heat energy is transferred to the soup by
A) / radiation.B) / insulation.
C) / conduction.
D) / electricity.
23)Marina is using a metal spoon to stir her soup. Why does the spoon feel warm?
A) / Stirring creates heat energy in the spoon.B) / Marina’s hand warms the spoon she is holding.
C) / Heat energy from the soup is transferred to the spoon.
D) / Heat energy from the spoon is transferred to the soup.
24)Bruce left some butter out in his kitchen. Bright sunlight came in through the window and melted the butter. Heat energy from the sun is called
A) / conduction.B) / convection.
C) / insulation.
D) / radiation.
25)Burning logs in the fire place produce heat energy. We get warm from the fire when heat energy is transferred by
A) / the air.B) / radiation.
C) / conduction.
D) / the flames.
26)An alligator is cold blooded. When it is cold, the alligator looks for a warm place to lay, like on the sand or a rock warmed by the sun. How does the sand or the rock warm the alligator?
A) / direct contact or conductionB) / through the air or radiation
C) / by heating up the air around the alligator
D) / by transferring heat into the alligators blood
27)When light from the sun warms the ground, the transfer of heat energy is called
A) / conduction.B) / power.
C) / radiation.
D) / reflection.
28)
Bowl / Time(in minutes)Bowl 1 / 10
Bowl 2 / 20
Bowl 3 / 30
Bowl 4 / 40
Ana poured equal amounts of water into four bowls. Then she put the bowls in the sun for different amounts of time. She recorded the temperature of the water in each bowl after its time was up. Which bowl should have the warmest water?
A) / Bowl 1B) / Bowl 2
C) / Bowl 3
D) / Bowl 4
29)Ana conducted an experiment on temperature change. She filled the four containers seen here with water and placed them in direct sunlight. Ana measured the temperature after 30 minutes. Which container MOST LIKELY had the warmest water?
A) /B) /
C) /
D) /
30)A cold cast iron skillet is placed onto a stove top. When the stove is turned on, the skillet becomes very hot. Why does the skillet become hot?
A) / The skillet is losing energy (heat) to the stove.B) / The stove is gaining energy (heat) from the skillet.
C) / The skillet is gaining energy (heat) from the stove.
D) / A chemical reaction occurs that makes the skillet hot.
31)Energy is transferred in solids byconduction, which means that
A) / heat travels in both directions.B) / heat travels from the cooler object to the hotter object.
C) / heat travels from the hotter object to the cooler object.
D) / heat does not travel between objects of different temperatures.
32)Which observation would be evidence that heat was transferred by radiation?
A) / A person feels colder when the wind is blowing.B) / A pan on a stove heats up the food placed in it.
C) / Warm air in the kitchen rises to the second floor of the house.
D) / A car with the windows rolled up gets very hot on a summer day.
33)A tank of water is separated into two sections. Hot green water is placed on one side of the tank and clear cold water is placed on the other side. What would you predict will happen when the partition separating the tank is removed? Why?
A) / The water will cool without mixing as heat is transferred by conduction.B) / You will see the green colored water move and mix with the cold water due to radiation.
C) / The clear water will move into the green water making it a lighter green by convection.
D) / You will see the green colored water move and mix with the cold water due to convection.
34)Which statement would be the best evidence that heat transfer through radiation has occurred and why?
A) / A pan gets hot on a stove. Radiation requires molecule to molecule contact.B) / On a windy day, you feel colder. This is because more heat is removed from your body.
C) / At several feet from a fire, you still feel the heat. Heat is transferred through the air.
D) / An oven uses fans to heat up the food inside faster. Radiation is the most efficient form of heat transfer.
35)Based on the principles of convection, conduction and thermal radiation, which scenario below is most similar to the following situation?
Heating a tin can of water using a bunsen burner.
B) / Warm air rising in a room where the air is moving.
C) / The sun warming up the roof on a house.
D) / Cold water sinking in a pot of water being warmed up on the stove.
36)
Which two images represent the principle of radiation?
A) / I and IIB) / III and IV
C) / I and III
D) / I and IV
37)What type of heat transfer is used to fry an egg in a pan and how can you tell?
A) / It is conduction because the egg gets cooked.B) / It is conduction because the egg is touching the pan.
C) / It is convection because you put oil in a frying pan to cook in it.
D) / It is convection because you can feel the heat a few inches away from the pan.
38)Which would be best categorized as heat transfer by conduction?
A) / Wearing a white shirt to stay cool on a summer day.B) / Cooling a burn on your hand by running your hand under cold water.
C) / Feeling the heat from a light bulb with your hand when touching the bulb.
D) / Feeling the heat from a light bulb while holding your hand from 6 inches away.
39)Which would be best categorized as heat transfer by convection?
A) / Wearing a white shirt to stay cool on a summer day.B) / Noodles rising and falling in a pot of boiling water
C) / Touching a metal spoon that is sitting in a pot of boiling water
D) / Using a heating blanket to get warm
40)In nature, hot air tends to rise and cool air tends to sink. This is behind the concept of convection heating that is used in ovens. Convection currents occur only in fluids such as liquids and gases but not in solids.
Which of the examples below is an example of convection?
B) / heating a fish tank.
C) / basking in the sun.
D) / striking a match.
Constructed Response Questions
Question #1
Susan needs to bake lots of cookies for a party. Explain why the temperature in the kitchen became uncomfortably high by the time Susan was ready to cook her fourth batch of cookies.
Question #2
Betsy was stirring a pot of hot soup with a large, metal spoon. The phone rang, so she left the spoon in the soup to go answer it. When she came back, the spoon felt very hot.Explain why the metal spoon felt hot. Would a wooden spoon left in hot soup feel warm too? Why or why not? Use the terms insulator and conductor in your response.