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- 1. Multiple Choice
What is the original source of the most of the energy that people use?
By radiation from the sun.
By convection from the sun.
By radiation from the Earth's core.
Conduction from Earth's core.
- 2. Multiple Choice
Which best explains how this roasting marshmallows happens?
Heat from the fire is conducted into the marshmallow.
Heat from the fire is radiated into the marshmallow.
The coolness of the marshmallow is conducted into the fire.
The coolness of the marshmallow is radiated into the fire.
- 3. Multiple Choice
Which best describes heat transfer by radiation?
A slice of bacon frying in a pan.
A pot on a stove boiling water.
Cooking a hotdog in a microwave.
A hot air balloon.
- 4. Multiple Choice
When choosing materials to build a fireplace, why is brick a better choice than metal?
Brick is a conductor.
Brick is heat resistant.
Metal is a conductor.
Meat is heat resistant.
- 5. Multiple Choice
What enables fireman to enter buildings that are on fire and return from them safely?
Convection cells keep fire away.
The heat makes the building expand so there is no more room.
Fireman wear heat resistant suits.
They are really fast.
- 6. Multiple Choice
Why should space be left at the top of the plastic bottle when filling with water and then freeze?
Because water expands when frozen.
Because water contracts when frozen.
Because plastic contracts when frozen.
Because plastic expands when frozen.
- 7. Multiple Choice
Popcorn is made from corn kernels. What happens when kernels are heated in a microwave?
The kernels expand.
The kernels dissolve.
The kernels become hard and brittle.
The kernels stick together to form ball.
- 8. Multiple Choice
Which of the following best describes CONVECTION?
When heat is transferred through waves.
When heat is transferred through objects that are touching.
The movement of gas or liquid in which warmer parts move up and the colder parts moves down.
- 9. Multiple Choice
What kind of heat transfer is occurring when the sun warms the sand?
Conduction
Convection
Radiation
All of them
- 10. Multiple Choice
Which of the following is an example of convection?
Hair dryer is drying up your hair
When a car engine turns hot after being turned on.
A spoon placed in the cup filled with cold coffee.
Boiling spaghetti noodles in water.
- 11. Multiple Choice
What heat transfer happens when you put the pan in the open stove?
Conduction
Convection
Radiation
None
- 12. Multiple Choice
Warm air rises and the cool air sinks demonstrates this type of heat transfer.
Conduction
Convection
Radiation
- 13. Multiple Choice
Heat transfers from an area of ________ temperature to an area of _______ temperature.
high to low
low to high
high to high
low to low
- 14. Multiple Choice
Walking on a warm sand with your bare feet shows this type of heat transfer.
conduction
convection
radiation
- 15. Multiple Choice
Ironing a shirt is an example of:
condensation
evaporation
conduction
convection
- 16. Multiple Choice
The ______ air rises and the cold air sinks in convection heat transfer.
warm
cold
same
very cold
- 17. Multiple Choice
Clark accidentally grabbed the handle of the hot pt. This shows ______________.
radiation
conduction
convection
- 18. Multiple Choice
You and your friends gathered around a campfire to keep warm. How heat is being transferred?
conduction
convection
radiation
- 19. Multiple Choice
This is the transfer of thermal energy through "space".
conduction
radiation
convection
spaceship
- 20. Multiple Choice
A huge rock at the park really gets hot during the day because of ____________.
conduction.
convection.
radiation.
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