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thermal energy

Total questions: 76

Worksheet time: 2hrs 28mins

Name
Class
Date
1.

In what direction does heat flow?

a)

cold to hot

b)

cold to cold

c)

hot to hot

d)

hot to cold

2.

This type of energy depends on mass, temperature and the phase of an object.

a)

nuclear

b)

chemical

c)

thermal

d)

electrical

3.

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

4.

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

a)

specific heat.

b)

thermal energy.

c)

heat engines.

d)

waste heat.

5.

The energy transferred between objects of different temperatures.

a)

thermal energy

b)

heat

6.
20 g of water. specific heat of water is 4.18 J/g°C.  temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
a)
418 Joules
b)
209 J
c)
83 J
d)
4.18 J
7.
The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams of copper?
a)
12.82 °C
b)
24.12°C
c)
351 °C
8.
The flow of thermal energy from warmer objects to cooler objects 
a)
Ice Cold
b)
Heater
c)
Heat
d)
Convection 
9.
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
10.
 How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/gx°C?    
a)
297 Joules
b)
0.003 Joules
c)
297 J/gx°C
d)
0.003 J/gx°C
11.
The particles of a gas move ____than the particles of the same substance in the liquid or solid state.
a)
faster
b)
slower
c)
same speed
12.

What happens when the thermal energy of a substance increases?

a)

Both the motion of the particles in the substance and the temperature of the substance increase.

b)

Both the motion of the particles in the substance and the temperature of the substance decrease.

c)

The motion of the particles in the substance increases, and the temperature of the substance decreases.

13.

A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to drop?

a)

The kinetic energy of the thermometer's liquid molecules increases.

b)

The kinetic energy of the water molecules decreases.

c)

The molecules in the thermometer's liquid spread apart.

14.

A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to rise?

a)

The molecules in the water move closer together.

b)

The molecules in the thermometer's liquid spread apart.

c)

The kinetic energy of the thermometer's liquid molecules decreases.

15.

What happens when heat is removed from water?

a)

The kinetic energy of the water particles decreases.

b)

The temperature of the water increases.

c)

The water particles move farther apart.

16.

Determine the specific heat of an unknown object that has a mass of 15g, released 2050J of heat and had a temperature change of 50C to 75C. 

a)

5.46 J

b)

5.5 J/g °\degree C

c)

768750 J

d)

768750J/g °\degree C

17.

The average kinetic energy of the particles in an object.

a)

thermal energy

b)

temperature

c)

heat

d)

specific heat

18.

The sum of kinetic energy & potential energy of all of the particles in the object.

a)

thermal energy

b)

heat

c)

temperature

d)

mechanical energy

19.
What is the energy of the movement of particles in a substance?
a)
Potential energy
b)
Kinetic energy
c)
Thermal energy
d)
Temperature
20.

Thermal energy depends on an object’s

a)

mass.

b)

phase(solid, liquid, gas)

c)

temperature

d)

all of the above

21.

In the formula Q=m x c x ∆T, which quantity represents the specific heat?

a)

c

b)

m

c)

Q

d)

∆T

22.
When an object is cooled, its molecules slow down and move closer together, causing the object to _____.
a)
shrink or contract
b)
expand or move apart
c)
squeeze into a solid
d)
become a gas
23.
The amount of thermal energy needed to raise the temperature of 1 kg of materials by 1 degree Celsius is called the ____.
a)
thermal pollution
b)
conduction
c)
convection
d)
specific heat
24.
True or false? Heat will stop when equilibrium is reached.
a)
True
b)
False
25.
An ice cube feels cold in your hand because:
a)
your hand is an insulator
b)
heat flows from your hand to the ice cube
c)
cold flows from the ice cube to your hand
d)
there is friction between your hand and the ice cube
26.
Conduction is heat transfer by -
a)
Touch
b)
Circles
c)
Waves
27.
The heat from a hot burner to a pot is transferred by ______.
a)
convection
b)
insulation
c)
radiation
d)
conduction
28.
The sun warming your skin is an example of heat transfer through 
a)
conduction
b)
convection
c)
radiation
d)
thermal electricity
29.
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.
30.
Which of the following are kinds of heat transfer.
a)
Conduction
b)
Convection
c)
Radiation
d)
All of the above
31.
In what direction do hot liquids and gasses move?
a)
Side to Side
b)
Down
c)
Up
d)
Back and Forth
32.

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

a)

Conduction

b)

Convection

c)

Radiation

d)

Thermal Equilibrium

33.
This is an example of a(n)
a)
Conductor of heat
b)
Insulator of heat
c)
Insulator of electrical
d)
None of the above
34.
What happens to particles as they heat up?
a)
They slow down
b)
Nothing
c)
They don't move
d)
They speed up
35.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
36.
If I heat up 2 pans of water one has 100 mL in it and one has 1000mL. Which one heats up the fastest?
a)
100 mL
b)
1000 mL
c)
They both heat up at the same speed
d)
They cool down.
37.

The specific heat is the amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.

a)

True

b)

False

38.
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
39.

Which of the following is not a method for heat transfer?

a)

Radiation

b)

Insulation

c)

Conduction

d)

Convection

40.

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

a)

Conduction

b)

Convection

c)

Radiation

41.

What is the definition of CONVECTION

a)

When heat transfers through waves.

b)

When heat transfers from objects that are touching.

c)

Heat transfer when a liquid or gas heats up, expands, becomes less dense and rises; or cools, becomes more dense, and sinks.

d)

Heat traveling from the sun

42.
An insulator is a material that:
a)
Transfers thermal and electrical energy
b)
Transfers electrical energy and slows thermal energy
c)
Slows electrical energy and allows thermal energy to pass
d)
Slows thermal and electrical energy from transfering
43.
A great conductor of energy is:
a)
wood
b)
plastic
c)
metal
d)
cloth
44.

Heating a room with a fireplace

a)

Conduction

b)

Convection

c)

Radiation

45.
What unit do you use to measure Thermal Energy?
a)
J/Kg ºC
b)
Kg
c)
ºC
d)
J
46.
If the particles of two substances have the same average kinetic energy, then___.
a)
the specific heats of the substances are identical 
b)
the particles will not react chemically
c)
the substances have equal thermal energies
d)
the substances have equal temperatures
47.
Heat is a flow of energy caused by
a)
specific heat
b)
density differences in solids
c)
temperature differences
d)
thermal expansion
48.
When you measure the temperature of hot soup, you are measuring the:
a)
thermal energy given off by the bowl
b)
specific heat of the bowl
c)
average kinetic energy of the particles in the soup
d)
thermal expansion of the particles in the soup
49.
As the kinetic energy of the molecules in a substance increases, the temperature of the substance __________.
a)
increases
b)
decreases
50.
The symbol for specific heat is .......
a)
c
b)
Q
c)
m
d)
t
51.
The temperature of an unknown piece of metal with a mass of 30.00 g changes from 25.0 °C to 35.0 °C when the metal absorbs 350.0 J of energy. What is the specific heat of the metal?
a)
1.17 J/g°C
b)
-1.17 J/g°C
c)
0.857 J/g°C
d)
-0.857 J/g°C
52.

How much heat is needed to raise the temperature of 0.3g of copper from 25oC to 30oC. (Specific Heat of Copper= 0.38)

a)

0.57J

b)

0.33J

c)

2.3J

d)

4.5J

53.

How much heat is needed to raise the temperature of 2.5g of wood from 50oC to 55oC. (Specific Heat of Wood= 1.75)

a)

34.897J

b)

13.5J

c)

21.875J

d)

4.5

54.
Heat is measured in 
a)
joules
b)
grams
c)
degrees celcius
55.

A reaction requires that 96.7 g of PCl₃ be raised from 31.7°C to 69.2°C. How much energy will this require given that the specific heat of PCl₃ is 0.874 J/g °C?

a)

6350J

b)

12700J

c)

1584J

d)

3169J

56.

A sample of iron receives 125J of heat energy that raises the temperature of the iron 32.0°C. What is the mass of the iron sample?

a)

8.70g

b)

14.4 g

c)

20 g

d)

50 g

57.

A metal with a mass of 55.00 g changes is heated to 97.0°C and then placed in 65.00 mL of 29.0 °C water. The temperature of the water increases to 31.5 °C What is the specific heat of the metal?

a)

0.20 J/g°C

b)

0.18 J/g°C

c)

0.19 J/g°C

d)

0..17 J/g°C

58.

Object A has a specific heat of 0.25 J/g⁰C and object B has a specific heat of 1.82 J/g⁰C. Which object will heat up faster?

a)

Object A, it has a lower specific heat

b)

Object B, it has a lower specific heat

c)

Object A, it has a higher specific heat

d)

Object B, it has a higher specific heat

59.

Object B has a specific heat of 0.45 J/g⁰C and object C has a specific heat of 0.82 J/g⁰C. Which object will heat up slower?

a)

Object C, it has a lower specific heat

b)

Object B, it has a lower specific heat

c)

Object B, it has a higher specific heat

d)

Object C it has a higher specific heat

60.
When water is heated from 10°C to 15°C What is the change in temperature?
a)
10 °C
b)
5 °C
c)
15 °C
d)
25 °C
61.
A material was cooled from 100ºC to 40ºC.  What is the temperature change?
a)
60ºC
b)
40ºC
c)
-60ºC
d)
-40ºC
62.

Which picture shows material that is more dense?

a)

The picture of the left

b)

The picture on the right

63.

Why does ice float?

a)

Due to convection currents

b)

It is more dense than water.

c)

It is less dense than water.

64.

What causes convection current in the Earth?

a)

The uneven heating on each layer inside the Earth.

b)

The crusts outer layer.

c)

The temperatures we feel outside.

65.

Can convection currents occur in a solid?

a)

No.

just in a liquid and gas.

b)

Yes.

In a solid, liquid, and gas.

66.

What is an example of a convection current?

a)

Touching a hot spoon that was in a soup bowl.

b)

Feeling the suns rays on a nice summer day.

c)

Touching an iron skillet after cooking and feeling the heat.

d)

Movement of gas in a hot air balloon.

67.

What is an example of convection currents

a)

Feeling the heat from a bonfire with your friends

b)

Touching a hot curling iron

c)

The movement of air in a circular motion in the atmosphere

68.

True or False

Convection currents is a type of heat transfer that can be felt though empty space.

a)

True

b)

False

69.
Which is NOT an insulator.
a)
Wool
b)
Plastic
c)
Copper
d)
Glass
70.
What is a example of a conductor?
a)
wood 
b)
metal
c)
rubber
d)
rock
71.
Which one is an insulator? 
a)
Silver 
b)
Copper 
c)
Mechanical pencil
d)
plastic 
72.
Which one is a conductor? 
a)
wood 
b)
iron 
c)
plastic spoon 
d)
paper 
73.
The candle will slowly heat the metal and transfer the heat directly to the mans hand.
a)
conduction
b)
convection
c)
radiation
74.
The Gulf Stream is a current that brings warm ocean water from the south to the north.
a)
conduction
b)
convection
c)
radiation
75.

insulation

a)

a mass of fluid flowing in a cycle in one place

b)

energy that travels through air and space

c)

material that can reduce energy transfers

d)

radiant energy that heats

76.

Convection

a)

energy transfer during which hot fluid rises and cold fluid sinks, creating a cycle

b)

energy that is radiated or transmitted through space in the form of rays, waves, or particles

c)

energy transfer by contact between particles

d)

radiant energy that heats

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