GPE
Heat Transfer 1
Heat Transfer 2
Heat Transfer 3
Multiple choice
100
How could you increase the gravitational potential energy of an object without changing its mass?
Raise the object farther off the ground
100
What type of heat transfer is when hot fluids rise and cool fluids sink?
What is Convection
100
Heat moves from the _____ object to the ______ object.
hotter ; cooler
100
Feeling the warmth from a campfire.
Radiation
100
Which best explains how roasting marshmallows happens?
a. Heat from the fire is conducted into the marshmallow.
b. The coolness of the marshmallow is conducted into the fire.
c. Heat from the fire is radiated into the marshmallow.
d. The coolness of the marshmallow is radiated into the fire.
C
200
The least amount of potential energy is at
C
200
The transfer of heat energy from the sun to Earth.
Radiation
200
Beneath the Earth's crust hot magma is rising and cool magma sinking.
Convection
200
Accidently burning your hand on a hot metal pan.
Conduction.
200
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
300
Any form of energy is always measured in...
Joules (J)
300
What type of heat transfer occurs through direct contact when objects are touching?
What is Conduction
300
What method of heat transfer is this?
Conduction (energy transfer via contact)
300
Radiation is when _____________ waves travel through space, without direct contact.
electromagnetic
300
People sitting around a campfire are able to feel the heat from the fire. How are the people able to feel the heat from the fire without touching the fire?
a. The heat from the fire travels through the ground and heats the ground around the people.
b. The heat from the fire is conducted through air molecules to the people.
c. The heat from the fire rises in the air and then settles around the people.
d. The heat from the fire radiates from the fire to the people.
D
400
What is the equation to work out Kinetic Energy
1/2 mass x velocity2
400
What method of energy transfer is this?
(Description: Heat flows from the hotter cup into the cooler hands. )
Conduction (energy transfer via contact)
400
What method of heat transfer is shown in the photo?
It is showing heat radiation
400
Name all modes of heat transfer.
conduction, convection and radiation
400
Bill stands in a swimming pool and notices that the water around his feet is a lot cooler than the water near the surface. Which process causes this difference in temperature?
a. convection
b. evaporation
c. radiation
d. conduction
A
500
What is the equation to work out gravitational potential energy?
mass x gravitational field strength x height
500
What method of heat transfer is shown here?
Convection heating (hot fluid rises, cool fluid sinks)
500
Describe an example of radiation.
Answers will vary. The warmth we feel from a fire.
500
Explain why it’s much colder at the bottom of a pool than at the top.
Convection makes the cool water sink and the hot water rise.
500
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
600
Sarah's book has a mass of 1.2kg. It is on a shelf that is 4.5m above the ground. The gravitational potential energy is...
52.92J
600
Which type of heat transfer is responsible for winds and precipitation, playing an important role in Earth's weather patterns.
Convection
600
Give one specific example of convection.
Answers will vary. The convection currents in the ocean and atmosphere.
600
Describe an example of conduction.
Answers will vary and must involve direct contact.
600
A spoon is placed into a mug of hot coffee. As the spoon sits in the coffee it begins to get warm. Which direction did the heat move?
a. From the spoon to the coffee
b. From the coffee to the spoon
c. From the surroundings to the coffee
B