Heat Transfer

QuizÂ by Ah Ra Cho

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10 questions
• Q1
Which of the following is an example of convection?
when a car engine turns hot after being turned on
a hair dryer is drying your hair
When you feel warmth from the heater
when you are making soup and the water is rising and lowering
120s
• Q2
When the light bulb heats the wax in a lava lamp, the wax rises. When the wax cools, it falls. This cycle of rising/falling is an example of:
conduction
convection
120s
• Q3
Which heat transfer is taking place when you are walking on the warm sand with your bare feet?
convection
conduction
120s
• Q4
Why does warm air rise?
It is less dense than cold air because the particles are spread out
It is more dense than cold air because the particles are spread out
It is less dense than cold air because the particles are closer together
It is more dense than cold air because the particles are closer together
120s
• Q5
How does the rod heat up?
The fire directly transfers heat directly to the rod and the heat spreads to the hand through covection
The fire directly transfers heat directly to the rod and the heat spreads to the hand through radiation
The fire directly transfers heat directly to the rod and the heat spreads to the hand through conduction
120s
• Q6
A chair is placed several feet from a fireplace. The fireplace has a glass screen. The side of the chair facing the fireplace gets warm due to which method of heat transfer?
conduction
convection
120s
• Q7
Stacy is holding her baby sister's hand. Stacy's hand is really warm while her baby sister's hand is really cold. Which direction will heat flow and through what method?
The heat energy will transfer from Stacy's hand to her baby brother's through radiation
The heat energy will transfer from Stacy's hand to her baby brother's through conduction
The heat energy will transfer from her baby brother's hand to Stacy's through conduction
The heat energy will transfer from her baby brother's hand to Stacy's through radiation
120s
• Q8
What is the main way that heat is transferred?
Conduction
Insulation
Convection
120s
• Q9
Which numbered part of the picture represents the way that energy from the sun reaches the Earth?
1
4
2
3
120s
• Q10
A crayon placed on a dark driveway in bright sunlight melted into a colorful puddle. What caused the crayon to melt?
Solar radiation heated the driveway and then heat transferred to the crayon by radiation
Solar radiation heated the driveway and then heat transferred to the crayon by conduction
Solar convection heated the driveway and then heat transferred to the crayon by conduction
Solar convection heated the driveway and then heat transferred to the crayon by radiation
120s

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