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Science
7th -
8thgrade
Heat Transfer: Conduction, Convection, Radiation
40 questions
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- 1. Multiple Choice
Hot coffee is stirred with a spoon, the spoon gets hot due to
Convection
Conduction
Radiation
- 2. Multiple Choice
A chair is placed several feet from a fire in a fireplace. The fireplace has a glass screen. The side of the chair facing the fireplace gets warm because of
Convection
Conduction
Radiation
- 3. Multiple Choice
A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to
Convection
Conduction
Radiation
- 4. Multiple Choice
Near the ceiling of a room the air is warmer. The warm air rises because of
Convection
Conduction
Radiation
- 5. Multiple Choice
In a swimming pool, the water near the surface is slightly warmer. The warm water rises because of
Convection
Conduction
Radiation
- 6. Multiple Choice
You are in the top bunk of a bunk bed and you want to turn the air conditioner on while your friend on the bottom bunk is fine is caused by
Convection
Conduction
Radiation
- 7. Multiple Choice
The cause of weather systems on earth is
Convection
Conduction
Radiation
- 8. Multiple Choice
A fireman feels a door and it is hot. Why does his hand feel hot?
Convection
Conduction
Radiation
- 9. Multiple Choice
A huge boulder at the state park gets so hot during the day.
Convection
Conduction
Radiation
- 10. Multiple Choice
Warm air over the beach rises while cooler dense air from the ocean rushes in due to
Convection
Conduction
Radiation
- 11. Multiple Choice
A house burns down. On the house across the street, all of the vinyl siding is twisted and warped by the heat. The heat was transferred across the street by
Convection
Conduction
Radiation
- 12. Multiple Choice
As you hold pieces of ice, they begi to melt from the warmth of you hand on them. This is because of
Convection
Conduction
Radiation
- 13. Multiple Choice
A group of friends gather around a fire to stay warm.
conduction
convection
radiation
- 14. Multiple ChoiceThe Gulf Stream is a current that brings warm ocean water from the south to the north.conductionconvectionradiation
- 15. Multiple ChoiceIn heat transfer, heat always flows from the _______________ substance to the _______________ substance.Hotter to colderColder to hotterHotter to hotterColder to colder
- 16. Multiple ChoiceThe type of heat transfer that happens through direct contact of molecules or particles with each other is ___________________.ConvectionConductionRadiationinsulation.
- 17. Multiple ChoiceThe kind of heat transfer that travels through space in electromagnetic waves is ______________________.insulation.RadiationConductionConvection
- 18. Multiple Choice___________________ is the type of heat transfer that occurs in fluids, such as warm air rising and cold air sinking; creating wind.ConvectionConductionRadiationinsulation.
- 19. Multiple Choice
Which statement is true?
The quicker a molecule moves, the colder it is.
The slower a molecule moves, the warmer it is.
The quicker a molecule moves, the warmer it is.
- 20. Multiple Choice
When you use a microwave, what is the main way that heat is transferred?
Convection
Conduction
Radiation
- 21. Multiple ChoiceThere are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?Large cup (Trenta)Small cup (Tall)VentiAll three are the same temperature so they have same thermal energy
- 22. Multiple ChoiceHow is the cat being heated?condensationconductionconvectionradiation
- 23. Multiple ChoiceWhich statement correctly compares the difference between conduction and convection in common classroom settings?Conduction can only occur in solids and gases, while convection can occur in both liquids and gasesConvection can only occur in solids, while conduction can occur in both liquids and gasesConduction can only occur in liquids and gases, while convection can occur in solids, liquids, and gasesConvection can only occur in liquids and gases, while conduction can occur in solids, liquids, and gases
- 24. Multiple ChoiceIn a hot summer day, a student jumps in a pool to freshen up. Which of the following is the best explanation of why the student felt much better as soon as he jumped in the water?The heat of the pool is transferred to the student making the water of the pool coolerThe heat of the student is transferred to the pool making the water of the pool warmerThe heat of the student is conserved and not transferredThe heat of the pool is conserved and not transferred
- 25. Multiple ChoiceAdding heat energy causes the atoms to...move slowermove fasterget biggerget smaller
- 26. Multiple ChoiceWhich phase of matter is represented by the atoms in this diagram?solidliquidgas
- 27. Multiple ChoiceBetween which points is the substance changing state?A-B only.A-B, C-D, E-FB-C only.B-C, D-E
- 28. Multiple ChoiceWhat line segment represents only the solid state?A-BB-CC-DD-E
- 29. Multiple ChoiceWhen the temperature of matter increases the particles...speed up and move closerspeed up and move farther apartslow down and move closer togetherslow down and move farther apart
- 30. Multiple ChoiceWhich diagram best describes the interaction between the cold juice bottle and your hand?ABCD
- 31. Multiple ChoiceThe Gulf Stream is a current that brings warm ocean water from the south to the north.conductionconvectionradiation
- 32. Multiple Choice
How does the thermal energy of the liquid in the larger beaker compare to the thermal energy of the liquid in the smaller beaker?
The liquid in the larger beaker has less thermal energy than the liquid in the smaller beaker.
The liquid in the larger beaker has more thermal energy than the liquid in the smaller beaker.
The liquid in the larger beaker has the same amount of thermal energy as the liquid in the smaller beaker.
The exact volume of the liquid in each beaker must be known to compare the thermal energy of the liquids.
- 33. Multiple Choice
Kito puts his spoon into a helping of fresh, hot, mashed potatoes as shown in the picture. Which process takes place when the objects come together?
The temperature of the spoon increases, but its thermal energy does not change.
Energy in the form of heat is transferred by conduction from the warmer mashed potatoes to the cooler spoon.
The thermal energy of both the mashed potates and the spoon increase as the energy in the form of heat is transferred between them.
The average temperature of the spoon does not change.
- 34. Multiple Choice
Ashton warms a pure, solid substance. He graphs the changes in temperature as shown in the figure below. What is happening as he warms the substance?
molecules move more slowly
molecules move more rapidly
speed of the molecules in not changing
molecules speed up than slow down
- 35. Multiple Choice
How does removing heat change the particles in a closed system?
Particles move apart
Particles slow down and break apart
Particles move faster and potentially change phases
Particles move slower and potentially change phases
- 36. Multiple Choice
Using the picture. What was the change in the system?
air was added to the system
heat was added to the system
water was added to the system
particles were added to the system
- 37. Multiple ChoiceAs energy in the form of heat is added to an ice cube, it begins to melt. What causes melting?Heat causes the molecules in the ice cube to expand and forces them apart.Heat removes thermal energy from the ice cube and causes it to become liquid water.The additional energy causes the bonds between hydrogen and oxygen in the ice cube to break.The transfer of thermal energy to the ice cube causes its molecules to move faster.
- 38. Multiple Choice
At room temperature, the metal mercury is a liquid. How could the mercury be changed into a solid?
by increasing the density of the mercury system
by decreasing the density of the mercury system
by removing heat from the mercury system
by adding heat to the mercury system
- 39. Multiple Choice
In the lab, Kendra placed a metal stirring rod into a glass beaker of boiling water that was sitting on a stand above an open flame. Kendra leaned the metal rod against the side of the beaker. About 15 minutes later, she touched the rod and noticed it was very hot. Which of these statements best explains what caused the rod to get hot?
Heat was radiated from the flame to the metal rod.
Heat was conducted from the flame to the metal rod.
Heat was convected from the glass beaker to the metal stirring rod.
Heat was conducted from the boiling water to the metal stirring rod.
- 40. Multiple Choice
A substance of mass 2.0 kilograms is originally in the solid state. The graph below represents the temperature of the substance as heat is added to it. During which interval is the average kinetic energy of the molecules of the substance unchanged?
BC
CD
AB
AC
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