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WorksheetsUnit 5 - Energy
Total questions: 115
Worksheet time: 2hrs 14mins
Name
Class
Date
1.
The transfer of heat energy by heat traveling through a metal is known as
a)
Conduction
b)
Convection
c)
Radiation
d)
Reflection
2.
Heat travels through liquids by
a)
Conduction
b)
Convection
c)
Radiation
d)
Reflection
3.
Heat may be transferred through a vacuum by
a)
Conduction
b)
Convection
c)
Radiation
d)
Reflection
4.
A toaster browns bread by converting
a)
electric energy to heat energy.
b)
heat energy to electric energy.
c)
mechanical energy to heat energy.
d)
chemical energy to electric energy.
5.
Heat energy transferred by conduction will travel best through
a)
solids
b)
liquids
c)
gases
d)
a vacuum
6.
Which is the best heat conductor?
a)
air
b)
iron
c)
wood
d)
glass
7.
When solar energy is transmitted through space to the earth, the process by which it is transferred is
a)
convection
b)
conduction
c)
deduction
d)
radiation
8.
A person sitting in front of a fireplace feels what type of heat energy?
a)
convection energy
b)
conduction energy
c)
solar energy
d)
radiation energy
9.
Thermal (heat) energy always flows from
a)
gas to a liquid.
b)
a liquid to a solid.
c)
a warmer region to a cooler region.
d)
a freezing material to a boiling material.
10.
It is possible to pour a mile long stretch of concrete when building a highway, but it is NOT done. Contractors pour a series of short sections with spaces called joints separating the sections. This is done to
a)
provide space for the concrete to expand during hot weather.
b)
provide space for the concrete to contract during hot weather.
c)
give rain water a place to drain off of the road surface during bad weather.
d)
make the road easier to replace since only small sections will need to be done at one time.
11.
Which of the following substances has the properties of a good thermal insulator?
a)
copper
b)
plastic
c)
aluminum
d)
silver
12.
In this type of heat transfer, no molecular motion is necessary. Heat can be transferred across large distances without any particles being present.
a)
conduction
b)
convection
c)
radiation
d)
transformation
13.
Many restaurants and kitchens use iron skillets to cook bacon, eggs, and biscuits for breakfast. A standard skillet has a mass of 850 g. When cooking bacon for breakfast the skillet starts at a temperature of 25 degrees Celsius. At the end of cooking, the temperature of the skillet reaches 120 degrees Celsius. The specific heat of iron is 0.45 J/(g°C).
Determine the heat energy gained by the iron skillet.
Determine the heat energy gained by the iron skillet.
a)
4.03 J
b)
382.5 J
c)
36,337.5 J
d)
179,444.4 J
14.
Albert stirs a mug of hot chocolate with a metal spoon. What type of heat transfer is responsible for the spoon getting hot?
a)
conduction
b)
convection
c)
thermoelectric
d)
radiation
15.
Which of the following could be used to convert light energy to electrical energy?
a)
a windmill
b)
a chemical storage battery
c)
a solar cell
d)
rotating coils in a magnetic field
16.
A rock dropped from a cliff has greater kinetic energy just before it reaches the ground than it did at the top of the cliff. Which of the following explains this fact?
a)
The rock's mass decreases as it falls.
b)
Falling has increased the rock's total energy.
c)
The rock's potential gravitational energy has been converted into kinetic energy.
d)
Chemical analysis will reveal that the rock's chemical energy has been consumed.
17.
When running a bath, the temperature of the water in the tub is too cold. To remedy this, you add hot water from the tap. Due to convection
a)
all of the hot water stays together.
b)
the hot water gradually moves throughout the tub.
c)
the cooler water is forced to the surface of the tub.
d)
the hot water molecules transfer energy through collisions to cooler water molecules.
18.
Which of these examples shows the conversion of mechanical energy into thermal energy?
a)
A plant produces sugars during photosynthesis from sunlight, water, and carbon dioxide.
b)
A solar-powered water heater warms water for a house.
c)
A camper starts a fire from two sticks and some tinder.
d)
A power plant burns coal to generate electricity.
19.
Which of these energy transformations occurs when a model rocket is launched and travels 1000 feet into the air?
a)
thermal energy to potential energy
b)
mechanical energy to thermal energy
c)
sound energy to chemical energy
d)
thermal energy to chemical energy
20.
In which of the following situations does a stone have the greatest kinetic energy?
a)
a stone at a cliff's edge
b)
a stone falling from a cliff
c)
a stone lying at the bottom of a cliff
d)
a person carrying a stone up a mountain
21.
Which of the following is the best restatement of the law of conservation of energy?
a)
In a closed system, kinetic energy equals potential energy.
b)
Energy is not created nor destroyed, but only changes from one form to another.
c)
Energy resulting from gravitational acceleration is constant throughout the universe.
d)
Energy within a biological community remains constant due to the interaction of producers, consumers, and decomposers.
22.
Which is an example of energy from chemical bonds being formed or broken transformed into energy of motion?
a)
lighting a match
b)
turning on a battery-operated toy car
c)
pushing a button on the TV remote control
d)
the wind turning the blades of a windmill
23.
In a coal burning power plant, coal is burned to heat steam to turn a turbine. The turbine generates power that is sent to homes and businesses.
Order the energy transformations of the power plant.
Order the energy transformations of the power plant.
a)
chemical, mechanical, electrical
b)
electrical, chemical, mechanical
c)
mechanical, chemical, electrical
d)
mechanical, electrical, chemical
24.
What do all of the processes listed here have in common?
- sawing a piece of wood
- lighting a match
- turning on a light bulb
- sawing a piece of wood
- lighting a match
- turning on a light bulb
a)
All transform into a form of energy from chemical energy.
b)
All transform into a form of energy from electrical energy
c)
All transform a form of energy into light energy.
d)
All transform a form of energy into heat energy.
25.
Every person uses energy stored in the fat cells of his or her body. This stored energy is in the form of
a)
heat energy.
b)
nuclear energy.
c)
chemical energy.
d)
mechanical energy.
26.
A hang glider is able to sail through the air on warm winds which are heated by Earth's surface. This best illustrates one use of which principle of heat transfer?
a)
conduction
b)
convection
c)
radiation
d)
solar transfer
27.
In a copper wire, a temperature increase is the result of which of the following?
a)
an increase in the size of the copper particles
b)
a decrease in the mass of the copper particles
c)
an increase in the motion of the copper particles
d)
a decrease in the distance between the copper particles
28.
A student in a laboratory transfers a beaker containing a hot solution from the lab table to a cool water bath. Which of the following parts of the system experiences an increase in heat energy?
a)
beaker
b)
lab table
c)
solution
d)
water bath
29.
A pot with 2400 g of water at a temperature of 25 deg C is heated on a stove until the water boils (100 deg C). The specific heat of water is 4.18 J/(g x deg C).
Determine the heat energy needed to heat the water in the pot to boiling.
Determine the heat energy needed to heat the water in the pot to boiling.
a)
133.76 J
b)
43,062.2 J
c)
752,400 J
d)
1,003,200 J
30.
Solid magnesium has a specific heat of 1.01 J/g°C. How much heat is given off by a 20.0 gram sample of magnesium when it cools from 70.0°C to 50.0°C?
a)
202 J
b)
404 J
c)
808 J
d)
1010 J
31.
For which of the following is kinetic energy converted into potential energy?
a)
a boulder rolls down a hill
b)
a ball is thrown upward
c)
a swing comes to a stop
d)
a bowling ball rolls horizontally
32.
The gravitational potential energy of an object changes when which of the following changes?
a)
the object's speed
b)
the object's mass
c)
the object's temperature
d)
the object's length
33.
Friction causes mechanical energy to be transformed into which of these forms?
a)
thermal energy
b)
nuclear energy
c)
kinetic
d)
potential
34.
When an energy transformation occurs, which of the following is true?
a)
Mechanical energy doesn't change.
b)
Mechanical energy is lost.
c)
The total energy doesn't change.
d)
Mass is converted into energy.
35.
Which of the following describes the energy conversions in a car's engine?
a)
chemical to thermal to mechanical
b)
chemical to electrical to mechanical
c)
thermal to mechanical to chemical
d)
kinetic to potential to mechanical
36.
Which is not a method of heat transfer?
a)
conduction
b)
specific heat
c)
radiation
d)
convection
37.
Which term describes the measure of the average kinetic energy of the particles in an object?
a)
potential energy
b)
thermal energy
c)
temperature
d)
specific heat
38.
Which of the following is the name for thermal energy that is transferred only from a higher temperature to a lower temperature?
a)
potential energy
b)
kinetic energy
c)
heat
d)
solar energy
39.
Look at the diagram. Which point does the ball have the maximum potential energy?
a)
A
b)
B
c)
C
d)
D
40.
Look at the diagram. At which point does the ball have the maximum kinetic energy?
a)
B
b)
C
c)
D
d)
E
41.
A cell phone battery dies. It gets plugged into an electrical outlet to recharge. Which of the following energy transformations occur during the charging?
a)
mechanical to chemical
b)
electrical to solar
c)
chemical to light
d)
chemical to electrical
42.
Tarzan is swinging through the jungle looking for Jane. He is constantly moving back and forth..his kinetic energy is being changed to
a)
electrical
b)
chemical
c)
potenital
d)
nuclear
43.
Mrs. Tolson's students are complaining that it is hot in the classroom. She plugs in the fan and turns it on, which energy transformation occurs?
a)
mechanical to electrical
b)
electrical to mechanical
c)
chemical to mechanical
d)
electromagnetic to mechanical
44.
Energy is the ability to do ___________.
a)
Nothing
b)
Work
c)
Energy
d)
Change
45.
Stored energy based on position is known as...
a)
Lazy
b)
Potential
c)
Kinetic
46.
A car moving down the road is an example of
a)
Potential
b)
Kinetic
47.
The sun’s energy used by green plants to produce food is an example of light energy being converted to what other form of energy?
a)
kinetic energy
b)
heat energy
c)
mechanical energy
d)
chemical
48.
Electrical Energy is transferred to _____ Energy.
a)
Thermal
b)
Solar
c)
Electrical
d)
None
49.
Solar Energy is transferred to _____ Energy.
a)
Mechanical
b)
Solar
c)
Sound
d)
Electrical
50.
Mechanical Energy is transferred to _____ Energy.
a)
Solar
b)
Mechanical
c)
Electrical
d)
Potential
51.
The Law of Conservation of Energy states that...
a)
energy can be destroyed
b)
energy can not be created or destroyed
c)
energy can only be destroyed using the force
52.
Energy can be created.
a)
True
b)
False
53.
Energy cannot be destroyed.
a)
True
b)
False
54.
Electrical -> Mechanical -> Sound
a)
A triple beam balance measuring an object’s mass
b)
A pencil sharpener plugged into a wall outlet
c)
A projector displaying a diagram on the screen
d)
A working flashlight used to light up a dark corner
55.
Which kind of energy change occurs when a candle is burning?
a)
Chemical to light
b)
Light to electrical
c)
Solar to heat
d)
Chemical to electrical
56.
Which skier will have a greater potential energy?
a)
Skier 1
b)
Skier 2
57.
When a bat collides with a baseball, the momentum of the bat
a)
transfers to the momentum of the ball
b)
transfers from the momentum of the ball
c)
does not transfer from the bat to the ball
d)
does not transfer from the ball to the bat
58.
What type of energy is in this picture?
a)
Kinetic
b)
Potential
c)
Chemical
d)
Sound
59.
Energy that is transferred by objects touching is called?
a)
Conduction
b)
Convection
c)
Induction
d)
Radiation
60.
What machine changes electrical energy into light and sound energy?
a)
battery
b)
lightbulb
c)
alarm clock
d)
apple
61.
On a roller coaster, where is maximum potential energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
62.
On a roller coaster, where is maximum kinetic energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
63.
The amount of heat required to raise the temperature of one gram of a substance by one degree Celsius is ________
a)
Heat energy
b)
Specific heat
c)
convection
d)
thermal energy
64.
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
65.
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
66.
The specific heat of aluminum is 0.21 cal/g°C. How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
a)
105 J
b)
10.5 J
c)
1.05 J
67.
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
68.
What has particularly high specific heat?
a)
Water
b)
Gases
c)
Metals
d)
Poptarts
69.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
70.
When a piece of aluminum foil is taken out of the oven and cools from 100° to 50°, What is the change in temperature?
a)
50°
b)
0°
c)
100°
d)
150°
71.
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?
a)
12.82 °C
b)
24.12°C
c)
351 °C
72.
If an object has particles that are moving very quickly, the object 's temperature is probably _____.
a)
cold
b)
slow
c)
big
d)
hot
73.
If an object has particles that are moving very slowly, the object's temperature is probably ______.
a)
hot
b)
small
c)
cold
d)
big
74.
The energy of moving particles in matter is called _____.
a)
thermal energy
b)
chemical energy
c)
electrical energy
d)
mechanical energy
75.
When holding a cup of ice water, your warm hand becomes cold. How does the heat transfer?
a)
From the cold cup to your hand
b)
From the cold cup to the warm air
c)
From the ice to your hand
d)
From your warm hand to the cold cup.
76.
When a popsicle melts, the particles _____.
a)
gain thermal energy and speed up
b)
there are no particles in popsicles
c)
lose thermal energy and slow down
d)
stay the same
77.
How many Joules of energy are required to change 10 gram of water with a specific heat of 4.18 J/g C from 20 C to 90 C?
a)
1400 J
b)
2926 J
c)
210,000 J
d)
1,400,000 J
78.
A 16g piece of iron absorbs 1000J of heat energy, and its temperature changes from 10C to 50C. Calculate the specific heat.
a)
15.625 J/g C
b)
156.25 J/g C
c)
1562.5 J/g C
d)
1.5625 J/g C
79.
Temperature measures the...
a)
Amount of particles in a substance
b)
The average speed of particles in a substance
c)
The amount of times particles collide
80.
The transfer of heat energy by heat traveling through a metal is known as
a)
conduction
b)
convection
c)
radiation
d)
reflection
81.
Heat may be transferred through a vacuum by
a)
conduction
b)
convection
c)
radiation
d)
reflection
82.
If a particular substance is a good electrical insulator, then you can assume it probably
a)
has no isotopes
b)
does not lose electrons easily
c)
is a liquid at room temperature
d)
is a compound rather than an element
83.
A toaster browns bread by converting
a)
electric energy to heat energy
b)
heat energy to electric energy
c)
mechanical energy to heat energy
d)
chemical energy to electric energy
84.
Heat energy transferred by conduction will travel best through
a)
solids.
b)
liquids.
c)
gases.
d)
a vacuum.
85.
Which is the best heat conductor?
a)
air
b)
iron
c)
wood
d)
glass
86.
When solar energy is transmitted through space to the earth, the process by which it is transferred is
a)
convection.
b)
conduction.
c)
deduction.
d)
radiation.
87.
A person sitting in front of a fireplace feels what type of heat energy?
a)
convection energy
b)
conduction energy
c)
solar energy
d)
radiation energy
88.
Thermal (heat) energy always flows from
a)
gas to a liquid.
b)
a liquid to a solid.
c)
a warmer region to a cooler region.
d)
a freezing material to a boiling material.
89.
It is possible to pour a mile long stretch of concrete when building a highway, but it is NOT done. Contractors pour a series of short sections with spaces called joints separating the sections. This is done to
a)
provide space for the concrete to expand during hot weather.
b)
provide space for the concrete to contract during hot weather.
c)
give rain water a place to drain off of the road surface during bad weather.
d)
make the road easier to replace since only small sections will need to be done at one time.
90.
Which of the following substances has the properties of a good thermal insulator?
a)
copper
b)
plastic
c)
aluminum
d)
silver
91.
A microwave oven is used to boil water for making hot tea. Explain how the water would be affected if a vacuum were used to remove all the air from the microwave before the heating began. (Assume the microwave has all of the same settings.)
a)
The water would get hotter due to reduced interference by air molecules.
b)
The water would not get as hot due to lack of transmission by the air molecules.
c)
The water would stay the same temperature because air molecules are not involved in the heat transfer.
d)
The water could not heat up because air molecules are required to transfer the energy from the microwave to the water.
92.
In this type of heat transfer, no molecular motion is necessary. Heat can be transferred across large distances without any particles being present.
a)
conduction
b)
convection
c)
radiation
d)
transformation
93.
Many restaurants and kitchens use iron skillets to cook bacon, eggs, and biscuits for breakfast. A standard skillet has a mass of 850 g. When cooking bacon for breakfast the skillet starts at a temperature of 25 degrees Celsius. At the end of cooking, the temperature of the skillet reaches 120 degrees Celsius. The specific heat of iron is 0.45 J/(g°C).
Determine the heat energy gained by the iron skillet.
Determine the heat energy gained by the iron skillet.
a)
4.03 J
b)
382.5 J
c)
36,337.5 J
d)
179,444.4 J
94.
Albert stirs a mug of hot chocolate with a metal spoon. What type of heat transfer is responsible for the spoon getting hot?
a)
conduction
b)
convection
c)
thermoelectric
d)
radiation
95.
Which of the following could be used to convert light energy to electrical energy?
a)
a windmill
b)
a chemical storage battery
c)
a solar cell
d)
rotating coils in a magnetic field
96.
A rock dropped from a cliff has greater kinetic energy just before it reaches the ground than it did at the top of the cliff. Which of the following explains this fact?
a)
The rock's mass decreases as it falls.
b)
Falling has increased the rock's total energy.
c)
The rock's potential gravitational energy has been converted into kinetic energy.
d)
Chemical analysis will reveal that the rock's chemical energy has been consumed.
97.
Electricity generated from sunlight is often used to power small devices like electronic calculators and less often used to power larger devices. Which of the following explains this?
a)
There is very little energy in the sunlight that reaches Earth.
b)
Solar energy is rarely used because it is generated by nuclear fusion.
c)
Photosynthesizing plants use up most of the energy reaching Earth from the sun.
d)
Technologies that convert light into electricity are usually inefficient.
98.
Which type of heat transfer is demonstrated by the fact that a metal spoon placed in an operational frying pan will heat up and burn anyone that touches the spoon without a pot-holder?
a)
convection
b)
conduction
c)
enthalpy
d)
radiation
99.
When running a bath, the temperature of the water in the tub is too cold. To remedy this, you add hot water from the tap. Due to convection
a)
all of the hot water stays together.
b)
the hot water gradually moves throughout the tub.
c)
the cooler water is forced to the surface of the tub.
d)
the hot water molecules transfer energy through collisions to cooler water molecules.
100.
Which of these examples shows the conversion of mechanical energy into thermal energy?
a)
A plant produces sugars during photosynthesis from sunlight, water, and carbon dioxide.
b)
A solar-powered water heater warms water for a house.
c)
A camper starts a fire from two sticks and some tinder.
d)
A power plant burns coal to generate electricity.
101.
Which of these types of heat transfer explains how the water molecules in coffee carry scent molecules across the restaurant?
a)
radiation
b)
conduction
c)
convection
d)
osmosis
102.
In which of the following situations does a stone have the greatest kinetic energy?
a)
a stone at a cliff's edge
b)
a stone falling from a cliff
c)
a stone lying at the bottom of a cliff
d)
a person carrying a stone up a mountain
103.
Which of the following is the best restatement of the law of conservation of energy?
a)
In a closed system, kinetic energy equals potential energy.
b)
Energy is not created nor destroyed, but only changes from one form to another.
c)
Energy resulting from gravitational acceleration is constant throughout the universe.
d)
Energy within a biological community remains constant due to the interaction of producers, consumers, and decomposers.
104.
The sun's heat reaches Earth by what means?
a)
convection
b)
conduction
c)
collision
d)
radiation
105.
Which is an example of energy from chemical bonds being formed or broken transformed into energy of motion?
a)
lighting a match
b)
turning on a battery-operated toy car
c)
pushing a button on the TV remote control
d)
the wind turning the blades of a windmill
106.
In a coal burning power plant, coal is burned to heat steam to turn a turbine. The turbine generates power that is sent to homes and businesses.
Order the energy transformations of the power plant.
Order the energy transformations of the power plant.
a)
chemical, mechanical, electrical
b)
electrical, chemical, mechanical
c)
mechanical, chemical, electrical
d)
mechanical, electrical, chemical
107.
What do all of the processes listed here have in common?
sawing a piece of wood
lighting a match
turning on a light bulb
sawing a piece of wood
lighting a match
turning on a light bulb
a)
All transform into a form of energy from chemical energy.
b)
All transform into a form of energy from electrical energy.
c)
All transform a form of energy into light energy.
d)
All transform a form of energy into heat energy.
108.
Every person uses energy stored in the fat cells of his or her body. This stored energy is in the form of
a)
heat energy.
b)
nuclear energy.
c)
chemical energy.
d)
mechanical energy.
109.
A hang glider is able to sail through the air on warm winds which are heated by Earth's surface. This best illustrates one use of which principle of heat transfer?
a)
conduction
b)
convection
c)
radiation
d)
solar transfer
110.
A softball is thrown and is hit high into the air. As it rises, the softball possesses
a)
only kinetic energy.
b)
only potential energy.
c)
both potential and kinetic energy.
d)
potential, kinetic, and electromagnetic energy.
111.
In a copper wire, a temperature increase is the result of which of the following?
a)
n increase in the size of the copper particles
b)
a decrease in the mass of the copper particles
c)
an increase in the motion of the copper particles
d)
a decrease in the distance between the copper particles
112.
A student in a laboratory transfers a beaker containing a hot solution from the lab table to a cool water bath. Which of the following parts of the system experiences an increase in heat energy?
a)
beaker
b)
lab table
c)
solution
d)
water bath
113.
A pot with 2400 g of water at a temperature of 25 °C is heated on a stove until the water boils (100°C). The specific heat of water is 4.18 J/(g°C).
Determine the heat energy needed to heat the water in the pot to boiling.
(Q = mcT)
Determine the heat energy needed to heat the water in the pot to boiling.
(Q = mcT)
a)
133.76 J
b)
43,062.2 J
c)
752,400 J
d)
1,003,200 J
114.
Solid magnesium has a specific heat of 1.01 J/g°C. How much heat is given off by a 20.0 gram sample of magnesium when it cools from 70.0°C to 50.0°C?
a)
202 J
b)
404 J
c)
808 J
d)
1010 J
115.
Convection is the result of —
a)
currents caused by the motion of heated molecules.
b)
increases in the density of solids.
c)
colder portions of liquids rising.
d)
the lack of heat transfer.
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