The ability to do work or cause a change is __________.
Energy is the ability to do work or cause a change.
100
Stored energy plus energy of motion is ___________.
Mechanical energy
100
Energy that can be heard is _____________.
Sound energy
100
The flow of energy from a warmer object to a cooler object is _________.
Heat
100
What kind of energy flows through wires?
Electrical energy or electricity
200
Name four different types of energy.
Mechanical, sound, heat, electrical, potential
200
What kind of energy do skateboarders use to roll down a hill?
Mechanical energy
200
A vibrating object causes vibrations in the air. What kind of energy do these vibrations in the air make?
Sound energy
200
True or False: Heat disappears.
False. Heat does not disappear. Pretend you have hot soup. Once the soup cools, the heat moves into the spoon, bowl, and surrounding air.
200
How do electronic devices like TVs get electricity?
TVs get electricity from an electrical outlet in the wall. Electrical energy flows through the wires in the TV plug.
300
True or False: Energy is found only in living things.
False. Everything has energy!
300
How is stored energy different from energy of motion?
Stored energy is energy that objects have when they are not moving. Energy of motion is energy that objects have when they are moving.
300
Compare volume and pitch.
Volume is how loud or soft a sound is. Pitch is how high or low a sound is.
300
What would happen if you rubbed two ice cubes together?
The ice cubes would warm up and probably start to melt.
300
What happens to electrical energy in a light bulb?
It changes into light.
400
What things do you use that require energy?
Any machine, tool, or appliance will work
400
True or False: When you run down a hill, your stored energy is changed to energy of motion.
True!
400
Name two objects that vibrate to cause sound.
Your vocal cords, cell phone, wind chimes, etc.
400
Pretend you are riding your bike. You come to a sudden stop, and your bike's tires skid across the sidewalk. You feel your tires and notice that the temperature of the tires has changed. What kind of change in temperature did your tires have?
The tires would become hotter.
400
Think of something in your home that uses electricity. How does this thing change from electricity into another form of energy?
One example is a TV: It has stored energy when it is turned off. It has light and sound energy when it is turned on.
Another example: A light bulb. It gives off light energy when it is turned on.