Worksheets能量复习 Review on Energy
Total questions: 40
Worksheet time: 41mins
What is energy?
moving energy
stored energy
renewable energy
The ability to do work.
What is kinetic energy?
moving energy
potential energy
stored energy
renewable energy
Four identical balls are rolled from the same position at the same time. The illustration shows each ball’s starting position and ending position after rolling for two seconds. Which ball had the most energy?
Ball 1
Ball 2
Ball 3
Ball 4
Two model trains are running on tracks that are lined up next to each other.
The two trains are not moving at the same speed. What would cause one train to move faster than the other?
The slower train’s cars have less mass.
The faster train has more energy.
The faster train has a wider track.
The slower train has an older engine.
We observe a moving object. When we observe the object moving more slowly, we know that it–
will move in a new direction.
has more gravity pulling on it.
can’t go back to where it started.
has less energy than it had before.
A moving object will have more energy when the object
moves faster
stops moving
changes direction
changes shape
4th grade students were observing a Hot Wheels car moving more slowly. They knew that the car
will move in a new direction.
has less energy than it had before.
will soon speed up again.
has more energy than it had before.
Students investigate balls as they roll down ramps and discover the higher the ramp, the more energy the ball is given. Which observation would be evidence for the idea that rolling balls that contain more energy travel faster?
balls that roll down ramps 20 centimeters high go faster than balls that roll down ramps 10 centimeters high
balls that roll down ramps 30 centimeters high go fast at first, but then they slow down and stop
balls that roll down ramps 10 centimeters high go faster on a tile floor than on a carpeted floor
balls that roll down ramps 20 centimeters high never travel any farther than 250 centimeters
Which ball most likely rolled the farthest?
ball 1
ball 2
ball 3
ball 4
The bike Dr. Jeff's mom is riding uses a generator to convert _____________ energy to ________________ energy, which is then used to charge BERT.
solar, mechanical
motion, electrical
heat, steam
hydro, electrical
Batteries store energy as chemical energy.
True
False
What does a solar cell do?
it converts light into electrical energy
it converts wind into electrical energy
it transmits radio wave signals into space
it converts water into solar energy
The picture showing the energy conversion
Electrical → light
is:
What is the energy conversion when you plug in a stereo and listen to music?
electrical to mechanical
chemical to heat
electrical to sound
potential to sound
What is the energy conversion when you burn wood for a fire?
electrical to thermal
light to kinetic
chemical to thermal
chemical to electrical
What kind of energy is represented in the picture?
Heat
Chemical
Sound
Nuclear
What is the energy conversion when you put batteries in a flashlight to make it turn on?
chemical to light
light to kinetic
chemical to thermal
nuclear to light
A television converts electricity into
light.
sound.
light and sound.
light, sound, and heat.
What types of energy are involved in this change?
heat
light
sound
motion
electrical
You plug in a lamp. The electrical energy transfers from the outlet into what type of energy
sound
motion
electrical
light
In the picture you can see a car has collided with a stop sign. Where does the energy from the car go?
All the energy from the car passes to the stop sign
None of the energy from the car passes to the stop sign
All of the energy from the car passes to the air
The energy from the car is shared between the car, the stop sign, the air and the road.
3. Students set up a model of a wrecking ball. They used a ball on a string for the wrecking ball and a wooden block to represent the building. After the collision the block moved forwards. This is because
There is no contact force from the wrecking ball
The contact force from the wrecking ball made the block move forward and potential energy is transferred from the ball to the block
The contact force from the wrecking ball made the block move forward and kinetic energy is transferred from the ball to the block
The contact force from the wrecking ball stops the block moving
What two types of energy are released into the air during the collision?
heat and sound
sound and light
light and heat
light and electrical
Look at the picture of the Newton's Cradle. When ball 1 is released it collides with the other balls and energy is transferred. Ball 6 will swing upwards and fall back down and collide with the other balls. Ball 1 will then swing upwards and fall back down. When the energy transfers back to ball 6 again, will it move upward to the same height?
Yes, because ball 6 has the same amount of energy
No, because ball 6 will have more energy and go higher
No, because ball 6 has lost energy
Which of the following would transfer more energy?
Lowering ball 1 before release
Raising ball 1 higher before release
Gently putting ball 1 down next to ball 2
Keeping ball 1 in the same place
Zoe picks up a book she left by a sunny window. She notices the book is warm to the touch. What can Zoe conclude from her observation?
heated air produces light
light travels faster than sound waves
light can transfer energy to objects and heat them
heat travels faster than light
Sydney went to her friend's house and pushed the button for the doorbell. What produced the sound she heard?
The energy of her push sent an electric current into the air
The energy from her push transformed directly into sound waves
The force of her push OPENED a circuit and caused a hammer to hit a bell
The force of her push CLOSED a circuit and caused a hammer to hit a bell.
Which of these uses electric currents to move energy from place to place?
a toaster
a campfire
a baseball bat
the sun
A circuit has a switch, a battery, and a bulb. When the switch is closed, the light turns on. What type of energy moves through the wires of this closed circuit?
sound
chemical
electrical
physical
Which of the following can move energy from place to place?
sound
a moving baseball
electric currents
all of the above
Addy spilled some sugar on the kitchen table. She pounded her fist on the table, and the grains of sugar moved. Why did the sugar move?
Light above the table transferred energy to the sugar
Vibrations made by Addy's pounding transferred energy to the sugar
Air above the table transferred energy to the sugar
Heat from Addy's fist transferred energy to the sugar
A player catches a moving ball. What happens to some of the ball's energy when it hits the player's mitt?
It changes to light.
It changes to electricity.
It changes to sound.
It is destroyed.
The picture showing the energy conversion
Light → electrical
is:
The picture showing the energy conversion
electrical → heat and light
is:
What is the energy conversion when a wind turbine turns to provide energy to a power grid?
electrical to potential
potential to kinetic
kinetic to electrical
nuclear to heat
