WorksheetsHeat Transfer and Energy Transformations
Total questions: 80
Worksheet time: 2hrs 30mins
Warm air is __________ dense than/to cold air and rises creating convection currents.
more
less
equally
Transfer of thermal energy through the void "space" is ___________.
conduction
convection
radiation
Hot coffee is stirred with a spoon; the spoon gets hot due to _____________________.
conduction
convection
radiation
A chair is several feet from a fireplace. The side of the chair facing the fireplace gets warm due to ________________.
conduction
convection
radiation
"Lava lamps" contain colored liquids. These liquids form globs that rise to the top due to ______________.
conduction
convection
radiation
Near the ceiling of a room the air is warmer; the warm air rises because of ___________________________.
conduction
convection
radiation
In a swimming pool, water near the surface is slightly warmer. The warm water rises because of ________________.
conduction
convection
radiation
Put the liquids in order from warmest to the coolest.
4, 3, 2, 1
1, 2, 3, 4
3, 4, 2, 1,
4, 3, 1, 2
As an object is heated its density ____________________.
increases
decreases
remains the same
In heat transfer, heat always flows from the _______________ substance to the _______________ substance.
Hotter to cooler
Cooler to hotter
Hotter to hotter
Colder to colder
___________________ is the type of heat transfer that occurs in things that flow, such as warm air rising and cold air sinking; creating wind.
Convection
Conduction
Radiation
insulation.
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
The movement of molecules don't affect temperature
A toaster toasting bread is an example of ____________________. Those red coils are infra red waves.
condensation
conduction
convection
radiation
A cat is napping several feet from a burning fire. The fireplace has a glass screen. The side of the cat facing the fireplace gets warm because of _____________________.
conduction
convection
radiation
Which numbered part of the picture represents the way that energy from the sun reaches Earth?
1
2
3
4
The man goes to take the hot pot off the stove with his bare hands. OUCH!!!!
conduction
convection
radiation
The baby chickens are kept warm from the heat lamps. Hint - Heat lamps are infra red waves.
conduction
convection
radiation
The transfer of heat by currents through anything that flows is called ___________________.
Perspiration
Radiation
Conduction
Convection
What happens when a cold drink sits in a hot room?
It remains cold
It gets warmer
It starts boiling
It starts to freeze
Which of the following best describes temperature?
Number of molecules
a measure of the kinetic energy of molecules
Mass and phase of molecules
Type of molecules
When two things are the same temperature:
They have the same number of molecules
Their molecules stop moving
Their molecules move at the same average speed
Heat transfer between the two things stops
Which of the following best describe a vacuum?
Hot
Cold
Shiny
Empty
Convection currents occur:
Only in liquids
When a dense substance is warmer than a less dense substance
In anything that flows
Weakly in solids
If an object has particles that are moving very quickly, the object 's temperature is probably _____.
cold
slow
big
hot
When the temperature of matter decreases the particles ...
speed up and move farther apart
speed up and move closer together
slow down and move farther apart
slow down and move closer together
The roller coaster cart has the most gravitational potential energy at position-
W
X
Y
Z
What is energy?
The ability to do work
A force
Electricity
The ability to transform work
On a roller coaster, where is maximum kinetic energy?
At the bottom of a big hill
When going around a corner
When going upside down
At the top of a big hill
Potential Energy is:
The energy of motion
always conserved
The energy of being still (waiting to happen)
What is the energy transformation that occurs in an electric pencil sharpener?
mechanical energy to electrical energy
electrical energy to mechanical energy
radiant energy to sound energy
chemical energy to mechanical energy
Which object shows an energy transformation from electrical to mechanical?
When a car burns gasoline it creates hot air to move the pistons in the engine, which causes the car to move. What energy transformation occur from the fuel to the movement of a car?
thermal energy to mechanical energy
thermal energy to chemical energy to mechanical energy
chemical energy to thermal energy to mechanical energy
chemical energy to electrical energy
Which items would have this energy transformation: electrical energy -> radiant, thermal energy and light energy?
toaster
candle burning
windmill turning
Iron for your clothes
Which items would have this energy transformation: mechanical energy -> sound energy?
turning on a flashlight
nuclear power plant
wind turbine turning
playing a violin
All energy can be transformed to transformed to _____ Energy.
Thermal
Solar
Electrical
None
What type of energy transformation happens in hydro-electric power?
kinetic to potential
sound to mechanical
chemical to electrical
mechanical to electrical
What kind of energy is represented in the picture?
Thermal
Chemical Potential
Sound
Nuclear
What type of energy is electrons flowing through a wire?
Electrical and kinetic energies
Chemical energy
Kinetic energy
Mechanical energy
What type of energy is stored in batteries or food?
Potential energy
Thermal energy
Chemical energy
Mechanical energy
Why does Mrs. McCully say, "There is no such thing as cold" when we are talking about temperature?
She is from the north and cold is a word for sissies.
She is hot blooded.
Cold is really only a lack of heat
She is a crazy, literal person.
Has the amount of energy in the entire universe ever changed?
No; my teachers tell me this, so it is true.
No; the Law of Conservation of Energy makes this clear.
Yes; we make energy all the time, when we use fossil fuels.
Yes; I run out of energy when I don't get enough to eat
What are some of the energy transformations that occur when you turn on a flashlight?
mechanical energy of the switch becomes light and potential energies
the thermal from your hand becomes mechanical and radiant energies
radiant energy from the Sun becomes light energy
chemical energy in the battery changes into light and thermal energies
Which of these explains the Law of Conservation of Energy
total energy = kinetic energy - potential energy
total energy = kinetic energy + potential energy
total energy = kinetic energy - potential energy
total energy = potential energy - kinetic energy
What is the term for a liquid becoming a gas? (think about your vocabulary)
evaporation
vaporization
boiling point
sublimation
Why does any interaction between particles transform into thermal energy?
the particle collide to create friction
the particles sit still and avoid friction
the particles can't find each other so it doesn't matter
friction is a state of mind; not a reality
