VOCABULARY
What is energy?
The ability to cause change.
What type of energy does a moving object have?
Motion energy.
What is energy transfer?
The movement of energy from one object to another or from one place to another.
What is an energy transformation?
The change of one form of energy into another form of energy.
Which shows motion energy causing a change?
A. A lamp turns on.
B. An ice cube melts.
C. A rolling ball knocks over bowling pins.
D. A toaster heats bread.
C. A rolling ball knocks over bowling pins.
What does it mean when two objects collide?
They come together with impact; one object runs into another.
What type of energy comes from a vibrating object?
Sound energy.
What can happen to energy when two objects collide?
Energy can transfer from one object to the other.
A light bulb is turned on. Electrical energy changes into what form of energy that we can see?
Light energy.
Which shows heat energy causing a change?
A. A drum makes a sound.
B. Sunlight causes a plant to grow.
C. Ice cream melts under the sun.
D. A battery powers a flashlight.
C. Ice cream melts under the sun.
What is stored energy?
Energy that has the ability to cause change at a later time.
Name three forms of energy that we studied.
Motion, sound, light, heat, electrical, or stored energy.
A rolling ball hits another ball and makes it move. What happened?
Energy is transferred from the moving ball to the other ball, causing it to move.
A computer uses electricity to display images on its screen. What type of energy is being transformed into light?
Electrical energy is being transformed into light energy.
What is an example of electrical energy causing a change?
A. Water boils.
B. A wind turbine rotates.
C. A light bulb glows when turned on.
D. A bird sings.
C. A light bulb glows when turned on.
What is the difference between energy transfer and energy transformation?
Energy transfer is energy moving from one object or place to another. Energy transformation is energy changing from one form to another.
A child is riding a bicycle faster and faster. What happens to the child's energy of motion?
It increases because the object is moving faster.
Two cars collide. Car A is moving very fast, and Car B is moving slowly. Which collision is likely to transfer more energy? Why?
The faster-moving car is likely to transfer more energy because greater speed means greater energy.
A flashlight is turned on in a dark room. What energy transformation is happening?
Electrical energy → light energy.
Which statement correctly describes speed and energy?
A. Energy decreases as speed increases.
B. Energy increases as speed decreases.
C. Energy does not depend on speed.
D. Energy increases as speed increases.
D. Energy increases as speed increases.
What does convert mean, and what is a conversion?
Convert means to change form. A conversion is the process of changing from one form to another.
A guitar string vibrates after someone strums it. What form of energy is produced, and what causes it?
Sound energy: the vibrating guitar string produces the sound.
Give two ways energy can be transferred from place to place.
Through electrical currents, heat, sound, or light.
A toaster is plugged into an outlet and heats bread. What is the main energy transformation?
Electrical energy → heat energy.
A student rolls a ball slowly toward a group of pins. The ball barely moves the pins. Then the student rolls another ball much faster, and the pins move much farther. Why does the second ball cause a greater change?
The faster ball has more energy of motion, so it can transfer more energy to the pins and cause a greater change.