WorksheetsEnergy
Total questions: 29
Worksheet time: 26mins
Name
Class
Date
1.
A hand-held video game is powered by batteries. After playing the game for several minutes, a student notices the game feels warm.Which of the following is the MOST LIKELY explanation for this observation?
a)
The game creates energy when it is turned on.
b)
Some of the energy from the batteries is changed to heat.
c)
Some of the energy from the batteries is changed to friction.
d)
The game receives heat energy from the person playing it.
2.
Your hands get warm by a fire because _______________ energy is converted into heat energy.
a)
chemical
b)
electrical
c)
mechanical
d)
nuclear
3.
Within the alarm clock seen here, energy is transformed. It is time to get up! The alarm clock goes off. What are the energy transformations taking place in your alarm clock?
a)
electrical to magnetic to sound
b)
electrical to mechanical to sound
c)
electrical to mechanical to light
d)
chemical to electrical to mechanical
4.
Maddie and Juan's were given the task of trying to cook a hot dog using the Sun! They built this oven using a box and aluminum foil. After setting up the device, they put two hot dogs in the box. Ten minutes later the hot dogs were hot and ready to eat. Describe the energy transformation that took place in the students' oven.
a)
Solar energy to heat energy
b)
Solar energy to light energy
c)
Reflected energy to heat energy
d)
Light energy to mechanical energy
5.
As temperature of a substance rises from 20°C to 50°C, the substance _______ heat and its kinetic energy _________.
a)
remains constant; increases
b)
absorbs; remains constant
c)
releases; increases
d)
absorbs; increases
6.
Light wands are small tubes that can be used to give off light without electricity or fire.A light wand keeps two fluids separate from each other until the wand is bent. Once the wand is bent, the tube holding the inner fluid breaks, and the two fluids mix together inside the wand.
Where does the light energy of a glowing light wand come from?
Where does the light energy of a glowing light wand come from?
a)
the heat energy of the fluids inside the wand
b)
light energy from the Sun striking the wand
c)
the mechanical energy of the broken tube
d)
the chemical energy of the fluids inside the wand
7.
A circuit is shown in the picture above. Energy is transferred first from the battery to the circuit wire and then from the circuit wire to the light. What energy transformations occur between these two transfers?
a)
Energy is transformed first from chemical energy to mechanical energy and then from mechanical energy to light and heat energy.
b)
Energy is transformed first from chemical energy to light and heat energy and then from light and heat energy to electrical energy.
c)
Energy is transformed first from mechanical energy to chemical energy and then from chemical energy to light and heat energy.
d)
Energy is transformed first from chemical energy to electrical energy and then from electrical energy to light and heat energy.
8.
Which of the following is the main reason water at the surface of the ocean is warmer than water at the bottom of the ocean?
a)
Water at the bottom of the ocean contains more dissolved solids
b)
Water at the surface of the ocean absorbs more energy from the sun
c)
Friction is created by fast moving currents at the surface of the ocean
d)
Wave action transfers heat from the bottom of the ocean to the surface
9.
Which of the figures here correctly shows the conduction of heat within the system of metal blocks? (bottom left block is 5oC, top block is -20oC, and bottom right block is 100oC)
a)
A
b)
B
c)
C
d)
D
10.
The diagram above shows 3 different methods of heat transfer. Identify which letter in the diagram represents radiation, convection, and conduction.
a)
A- conduction
B- convection
C- radiation
B- convection
C- radiation
b)
A- radiation
B- conduction
C- convection
B- conduction
C- convection
c)
A- convection
B- conduction
C- radiation
B- conduction
C- radiation
d)
A- convection
B- radiation
C- conduction
B- radiation
C- conduction
11.
Sandra performs an experiment using the setup in the diagram. Which argument BEST explains Sandra's findings?
a)
The radiant energy from the sun transformed into heat energy in the bag and then transferred to the water.
b)
The mechanical energy of the air converted to thermal energy in the water and warmed the bag.
c)
The heat energy of the bag in a closed system built up over time, there was no energy transformation or transfer.
d)
The radiant energy of the sun was absorbed by the water and transformed into heat energy in the closed system of the bag and bowl of water.
12.
The bicycle rider ate breakfast before her morning ride. Which of the following energy transformations occurred during the bike ride?
a)
Kinetic energy to chemical energy
b)
Chemical energy to kinetic energy
c)
Kinetic energy to nuclear energy
d)
Nuclear energy to kinetic energy
13.
Windmills are used to convert wind energy into a more useful form. In most cases, there are three steps to the process. The energy is in a different form at each step. Which of these sequences shows the most likely order of the energy changes?
a)
Wind energy→mechanical energy→solar energy
b)
Wind energy→thermal energy→mechanical energy
c)
Wind energy→solar energy→electrical energy
d)
Wind energy→mechanical energy→electrical energy
14.
A hand-held video game is powered by batteries. After playing the game for several minutes, a student notices the game feels warm.Which of the following is the MOST LIKELY explanation for this observation?
a)
The game creates energy when it is turned on.
b)
Some of the energy from the batteries is changed to heat.
c)
Some of the energy from the batteries is changed to friction.
d)
The game receives heat energy from the person playing it.
15.
During an investigation, Phillip filled two cups with the same amount of water and placed them in a 20⁰ C room for 30 min. Cup 1 was filled with 5⁰ C water, and cup 2 was filled with 35⁰ C water The diagram above shows the temperatures of the cups at the beginning of the investigation and 4 possible ways the temperatures would change. Which graphed change is MOST LIKELY to occur?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
16.
A cyclist rides down a hill, as shown above. Where is his gravitational potential energy the lowest?
a)
point W
b)
point X
c)
point Y
d)
point Z
17.
At what point does the skateboarder have the MOST kinetic energy and the LEAST potential energy?
a)
point 1
b)
point 2
c)
point 3
d)
point 4
18.
Which of the following statements describes an energy change as the person lifts the mallet and brings it down to the target?
a)
Kinetic energy increases as the mallet reaches its highest point, then decreases as the mallet drops toward the target
b)
Potential energy decreases as the mallet reaches its highest point, then increases as the mallet drops toward the target
c)
Kinetic energy converts to potential energy as the mallet falls toward the target
d)
Potential energy converts to kinetic energy as the mallet falls toward the target
19.
Use the image to complete.
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
20.
True or False: The electric car converts some of the electrical energy into thermal energy.
Select the response that is the MOST logical.
Select the response that is the MOST logical.
a)
True, because nearly all energy transformations produce thermal energy as a biproduct
b)
False, because there is no wasted energy in such an efficient car
c)
True, because the tires will have friction. This is the ONLY place you will have thermal energy
d)
False, because the heater in the car does not count. Otherwise, there is only sound and mechanical energy.
21.
Rock A and rock B are located at the same height on the top of a hill. The mass of rock A is twice the mass of rock B. How does the potential energy of rock B compare to that of rock A?
a)
Rock B has twice the potential energy of rock A.
b)
Rock B has the same potential energy as rock A.
c)
Rock B has one-quarter the potential energy of rock A.
d)
Rock B has one-half the potential energy of rock A.
22.
As a pendulum swings back and forth, which of the graphs above BEST illustrates the potential energy (PE) and kinetic energy (KE) changes over a period of several swings?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
23.
A small car is traveling at a speed of 60 mph on the highway. In the next lane, a large passenger bus is traveling at the same speed. Which of the following is true?
a)
The car and the bus have potential energy, not kinetic energy.
b)
The car has more kinetic energy than bus.
c)
The car and bus have the same amount of kinetic energy.
d)
The bus has more kinetic energy than the car.
24.
Which of the following statements best explains the relationship between the kinetic energy of the ball and its speed?
a)
The kinetic energy of the ball decreases as its speed increases.
b)
The kinetic energy of the ball increases over time as the ball travels at a constant speed.
c)
The kinetic energy of the ball remains the same as its speed increases.
d)
The kinetic energy of the ball increases as its speed increases.
25.
At which of the following points does the runner have the most kinetic energy?
a)
Z
b)
W
c)
Y
d)
X
26.
A yacht and a speedboat are traveling down a river. The yacht has a mass of 6,000 kg, and the speedboat has a mass of 1,500 kg. The graph above shows the kinetic energies of the boats as they gain speed. If both boats gain speed at the same rate, why does the yacht have more kinetic energy?
a)
It sits up higher in the water.
b)
It has more mass.
c)
Its length is greater.
d)
It encounters more air resistance.
27.
Does a baseball have kinetic energy right after it has been pitched?
a)
No, because it is not living.
b)
Yes, because friction heats the ball.
c)
Yes, because it is moving.
d)
No, because it is not large enough to have energy.
28.
At which point does the ball have the greatest gravitational potential energy? Explain your answer.
a)
Point A because the basketball player is about to release the ball and add kinetic energy to the ball.
b)
Point B because it is still gaining height and has not lost any of the energy it is building up.
c)
Point C because it has reached its highest point and gravity will accelerate it faster and faster as it falls.
d)
Point E because it is hitting the floor, compressing, and it is about to bounce back up in the other direction.
29.
An engineering student is gathering data on the motion of a model car traveling down a ramp. If energy is conserved, the potential energy of the car at the top of the ramp should equal the kinetic energy of the car at the bottom of the ramp. After the first trial, the student calculated that the kinetic energy at the bottom of the ramp is less than the potential energy at the top of the ramp.Which of the following can BEST explain this difference?
a)
The car gained a small amount of mass as it moved down the ramp.
b)
The student accidentally accelerated the car at the top of the ramp.
c)
The measured height of the ramp was less than the actual height of the ramp.
d)
The student did not include the effect of frictional force in the calculation.
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