Definitions
The flow of electric charges is known as what?
Electric Current
When John pulls back on a bow string to shoot an arrow, energy is being stored in the string.
True
Describe the energy transformations in lamp.
It changes from electric energy into light and heat.
Freddie noticed that when he opened his bedroom door, the door hit the wall. He decided to design something to absorb the energy of the door so that it does not damage the wall. Which solution would be best?
A. a glass cup
B. a pencil
C. a spring
D. a fork
C. a spring
Which action would produce the most sound energy?
A. turning on a flashlight
B. warming food by a fire
C. unplugging a cord from an outlet
D. hitting a baseball with a wooden bat
D. hitting a baseball with a wooden bat
The movement of energy from place to place or from one object to another is called what?
Energy transfer
When John pulls back on a bowstring to shoot the arrow, then lets go of the string, stored energy will be transferred into motion energy.
True
Describe the energy transformation in an electric fan.
It changes from electric energy to motion and sound energy.
Which sentence is false about energy and motion?
A. Energy and motion are related.
B. Objects that are moving do not have energy.
C. The more energy an object has, the faster it is moving.
D. The less energy an object has, the slower it is moving.
B. Objects that are moving do not have energy
When objects collide, energy is usually transformed into which forms?
A. heat and light
B. heat and store
C. heat and chemical
D. heat and sound
D. heat and sound
The energy that moves between objects of different temperatures is known as what?
Heat
Flashlights convert electric energy into sound energy.
False
Describe the energy transformation in a television.
It changes from electric energy to light and sound energy.
Which airplane has the greatest energy?
A. a plane that travels 240 kilometers in 1 hour
B. a plane that travels 360 kilometers in 1 hour
C. a plane that travels 480 kilometers in 1 hour
D. a plane that travels 550 kilometers in 1 hour
D. a plane that travels 550 kilometers in 1 hour
Ashlynn and Holly put a spring on a dowel. Then they add a foam ball to the dowel. They push on the ball to squeeze the spring, and then they let the ball go. Which energy transformation are they investigating?
A. stored energy to store energy
B. stored energy to motion energy
C. chemical energy to stored energy
D. electrical energy to motion energy
B. stored energy to motion energy
The result of two or more objects bumping into each other is known as what?
Collisions
Microwaves convert electric energy into sound and heat energy so that people can quickly heat their food.
True
Describe the energy transformation in a portable music player.
It changes from electric to sound energy.
Ariel investigates the motion of a ball. She uses a rubber band wrapped around the legs of a chair to launch the ball. She discovers that the farther she pulls back with the rubber band, the faster the ball will travel. Which conclusion should Nell draw?
A. Increasing the pull on an object will increase its speed.
B. Increasing the weight of an object will increase its speed.
C. Increasing the distance an object travels will increase its speed.
D. Increasing the energy applied to an object will increase its speed.
A. Increasing the pull on an object will increase its speed.
The lamp in Max’s bedroom is too bright. How could Max control the brightness of the light bulb?
A. use a bigger bulb
B. take the light bulb out of the lamp
C. change the length of the wire that connects to the bulb
D. change the amount of energy that is being transferred to the bulb
D. change the amount of energy that is being transferred to the bulb
The change in energy from one form to another is known as what?
Energy Transformation
Blowdryers convert light energy into heat energy so that that people can stay warm during the winter.
False
Describe the energy transformation in a battery operated toy car.
It changes from stored energy into motion energy or
from electrical to motion energy.
A soccer ball is rolling. What kind of energy does it have?
A. light
B. heat
C. motion
D. sound
C. motion
James says that batteries produce energy. What does he most likely mean?
A. Batteries make energy from nothing.
B. Batteries are the only way energy is stored.
C. Batteries are the original source of all energy.
D. Batteries convert stored energy to electrical.
D. Batteries convert stored energy to electrical.