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Thermal Energy

Total questions: 63

Worksheet time: 1hrs 16mins

Name
Class
Date
1.
Conduction can only occur between two objects when –
a)
one object is less dense than the other.
b)
both objects are in physical contact with each other.
c)
one of the objects is made of a metal.
d)
both objects are exactly the same temperature.
2.
Which of the following is an example of conduction?
a)
Solar energy warming a room.
b)
Heat rising from the coils of a stove.
c)
Hot air drying a wet towel.
d)
Heat moving from a clothes iron to a shirt.
3.
Which of the following are kinds of heat transfer.
a)
Conduction
b)
Convection
c)
Radiation
d)
All of the above
4.

Heat will always transfer from the ___________ object to the ________ object.

a)

The hottest object to the coolest object.

b)

The coolest object to the hottest object.

c)

The solid object to the liquid object.

d)

The liquid object to the solid object.

5.
Convection is heat transfer by-
a)
Touch an object
b)
The heating and cooling of a fluid
c)
Electromagnetic Waves
6.
Radiation is heat transfer by-
a)
Touch
b)
Circles
c)
Waves
7.
The way the heat is moving from the hot coffee is called...
a)
convection
b)
radiation
c)
insulation
d)
conduction
8.
When the 2nd story of a house is warmer than the 1st floor of a house is heat transfer through 
a)
conduction
b)
convection
c)
radiation
d)
thermal equilibrium
9.
The sun warming your skin is an example of heat transfer through 
a)
conduction
b)
convection
c)
radiation
d)
thermal electricity
10.
What  is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ½mv
d)
m=QC
11.
The flow of thermal energy from warmer objects to cooler objects 
a)
Ice Cold
b)
Heater
c)
Heat
d)
Convection 
12.
The heat from a hot burner to a pot is transferred by ______.
a)
convection
b)
insulation
c)
radiation
d)
conduction
13.
Radiation is a method of thermal energy transfer that moves -
a)
through empty space.
b)
when objects touch.
c)
only through solids.
d)
in the motion of fluids.
14.

What type of heat transfer takes place in liquids and gasses?

a)

Conduction

b)

Convection

c)

Radiation

d)

Thermal Equilibrium

15.
Which example below is an example of convection?
a)
Standing on a hot metal bridge
b)
The attic is warmer than the basement
c)
The Sun heating the Earth
d)
Touching hot sand with your feet
16.
What would be the effect on the particles if more heat is supplied to the system?
a)
They would slow down
b)
They would stop moving
c)
They would speed up
d)
There would be no effect
17.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
18.
Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC
a)
Wood
b)
Water
c)
Both are the same
19.

What is defined as a measure of the average kinetic energy of the particles in a sample of matter?

a)

Temperature

b)

Heat

c)

Specific Heat

d)

Mechanical Energy

20.

_____________ is the form of energy that is transferred between systems or objects with different temperatures.

a)

Temerature

b)

Heat

c)

Specific Heat

d)

Mechanical Energy

21.

A lava lamp is an example of which type of heat transfer?

a)

Conduction

b)

Convection

c)

Radiation

22.

What is occurring between points B and C on the heating curve above?

a)

Melting

b)

Freezing

c)

Boiling

d)

Condensing

23.

Why doesn't the temperature increase between points B and C, and points D and E on the heating curve above?

a)

Heat isn't being added.

b)

Heat is being removed.

c)

The added energy is being used to cause a phase change.

d)

Time has stopped.

24.
Why is there more thermal energy in an iceberg than in a pot of boiling water?    
a)
a.  The pot insulates the heated molecules
b)
b.  Most icebergs are fairly warm to the touch
c)
  c.  Icebergs contain many more molecules than pots of water
d)
  d.  Water does not hold heat very well
25.

What tool is used to measure temperature?

a)

a stove

b)

a beaker

c)

a thermometer

d)

a glove

26.

Temperature is a measure of how

a)

the particles are stationary.

b)

energy remains the same.

c)

hot or cold an object is compared to a reference point.

27.

The amount of heat needed to raise the temperature of one gram of a material by one degree Celsius is called

a)

Specific Temperature.

b)

Specific Heat

c)

Absolute Heat

28.

The lower a material's specific heat, the more its temperature rises when a given amount of energy is absorbed by a given mass.

a)

True

b)

False

29.

The instrument used for measuring thermal energy.

a)

barometer

b)

thermometer

c)

calorimeter

30.

The transfer of thermal energy when particles of a fluid move from one place to another is called

a)

conduction.

b)

convection.

c)

radiation.

31.

This law states the energy is conserved.

a)

Newtons 1st Law of motion

b)

1st law of thermodynamics

c)

2nd law of thermodynamics

32.
The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and
a)
mass
b)
work done
c)
force
d)
pressure
33.
Which best describes ENTROPY?
a)
Useful heat energy needed to drive an engine
b)
Heat that can be stored to be used at a later date
c)
  Random energy that escapes from the system
d)
A state of order in a physical system
34.
Which state of H2O  has the greatest entropy?
a)
Ice
b)
Water
c)
Vapor
35.
Which statement is true about the ENTROPY?
a)
Entropy refers to DISORDER, the unusable energy that escapes a system.
b)
Entropy refers to the balance of temperature among two or more systems.
c)
Entropy refers to the average kinetic energy of the molecules.
d)
Entropy refers to the inability to destroy or create energy. 
36.
As a system becomes more disordered, entropy
a)
remains the same
b)
increases
c)
decreases
d)
cannot be determined
37.
The first law of thermodynamics is a restatement of the
a)
Zeroth law of thermodynamics
b)
law of heat addition
c)
principle of entropy
d)
conservation of energy
38.

Which is an example of decreasing entropy in a closed system?

a)

Boiling water

b)

Freezing water

c)

Cells in a body coming together

d)

Ice melting

39.
A slower particle has a lower energy than an identical, faster particle.
a)
True
b)
False
40.
Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C. This would violate the
a)
first law of thermodynamics.
b)
second law of thermodynamics.
c)
both of the above
d)
none of the above
41.
A substance with a high specific heat:
a)
Is always extremely hot.
b)
Requires a lot of energy to become hot.
c)
Is not heavy.
d)
Does not requires a lot of energy to become hot.
42.
The second  law of thermodynamics states that entropy of a system  tends to ______________. 
a)
increase
b)
decrease
c)
stay constant
d)
fluctuate wildly
43.
The temperature of a glass of cold water will eventually...
a)
Match the temperature of the surrounding environment.
b)
Always be colder than the surrounding environment.
c)
Become warmer than the surrounding environment.
d)
Never change temperature.
44.

Celsius Scale

a)

water freezes at 0 degrees and boils at 100 degrees

b)

water boils at 212 degrees and freezes at 32 degrees

c)

Water boils at 273 degrees and boils at 373 degrees

45.

The variable foe HEAT

a)

Q

b)

C

c)

T

46.

The variable for Specific Heat

a)

Q

b)

C

c)

T

47.
Stored energy that results from the position or shape of an object is called...
a)
Thermal
b)
Potential
c)
Kinetic
d)
Gravitational
48.

A student volunteers to bring ice tea to a class picnic. She boils water to which she has added tea bags. Time is running short, so she places hot tea into an insulated, steel container, adds some ice cubes then seals the container. Assume that there is no heat exchange with the surroundings. Which of the following would be true?

a)

The total energy and entropy both remain the same.

b)

The total energy decreases while the entropy increases.

c)

The total energy and entropy decreases.

d)

None of the above.

49.
What is absolute zero?
a)
0 K
b)
273 K
c)
0oC
50.
I can't be created nor destroyed. What am I?
a)
energy
b)
air
c)

nothing

d)
a unicorn
51.
Entropy increases from solid, liquid to gas. Why?
a)
Molecular disorder increases
b)
Molecular randomness decreases
c)
Molecules are more energetic
d)
Molecules are more reactive
52.
How much energy is required to heat up 12kg of copper from 10 °C to 120 °C. The specific heat capacity is 390 J/kg °C.
a)
46800 J
b)
561600 J
c)
514800 J
53.
Specific heat of water is  4.18 J/g°C. Specific heat of wood is 1.760 J/g°C What material needs more heat energy to raise the temperature?
a)
Water
b)
Wood
c)
Both are same
54.

The heat absorbed while a solid is melting is known as....

a)

heat of fusion

b)

heat of solid

c)

heat of liquid

d)

heat of vaporization

55.

Temperature when a substance changes from a solid to a liquid

a)

freezing point

b)

heat of fusion

c)

thermal expansion

d)

melting point

56.

The Temperature when a liquid turns to a solid

a)

freezing point

b)

heat of fusion

c)

thermal expansion

d)

melting point

57.

Temperature when a substance changes from a liquid to a gas

a)

Heat of Vaporization

b)

Boiling point

c)

Heat Energy

d)

Phase change

58.

Water molecules have the greatest kinetic energy in

a)

Ice at 0 ⁰C

b)

Water at 90 ⁰C

c)

Water at 373 K

d)

Steam at 150 ⁰C

59.

Which of the following best explains why the sand at the beach is hotter than the water?

a)

Sand has a higher specific heat than water.

b)

Sand has a lower specific heat than water.

c)

There is more water than sand at the beach.

d)

There is more sand than water at the beach.

60.

Consider the following temperature-time graph when a solid is heated. which part of the graph involves latent heat of vaporization?

a)

Part I

b)

Part II

c)

Part III

d)

Part IV

61.
What unit do you use to measure Thermal Energy?
a)
J/Kg ºC
b)
Kg
c)
ºC
d)
J
62.

Equal mass samples of Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using 10,000 JOULES of thermal energy. What material would have the LARGEST change in temperature?

a)

Copper

b)

Carbon Steel

c)

Zinc

d)

Stainless Steel

63.

Equal mass samples of Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using 10,000 JOULES of thermal energy. Based on the chart, which material would be have the SMALLEST change in temperature?

a)

Copper

b)

Carbon Steel

c)

Zinc

d)

Stainless Steel

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