Electrical Energy
Heat Energy
Sound Energy
Light Energy
Vocabulary
100
What is given off when electrical energy changes form?
Heat
100
What is heat energy also known as?
Thermal energy
100
True or false: Sound waves can travel in outer space.
False
100
When does a shadow occur?
When the path of light is blocked by an object.
100
What is energy?
The ability to do work or cause a change.
200
Electrical energy is changed to what kind of energy in a radio speaker?
Sound energy.
200
What occurs when you rub your hands together? What is that called?
Friction
200
All sounds are made when matter does what?
Vibrates
200
What uses light energy from the sun?
Plants
200
What is Kinetic Energy?
Energy of motion.
300
What does electrical energy power in peoples' homes? (General term)
Appliances. Will also accept 'light bulbs.'
300
What object's energy reaches the earth as heat and light?
The sun.
300
When are echoes caused?
When sound waves bounce off objects.
300
True or false: Light energy can be seen.
True
300
What is Potential Energy?
Stored energy
400
When an electric circuit is ________, current cannot flow.
open
400
What happens when a warm object comes into contact with a cool object?
The warm object loses heat, and the cool one gains heat.
400
Sound travels the slowest in what? Why?
Gases. The particles are farther apart.
400
What does it mean when light energy is reflected?
Light bounces off an object.
400
What is Mechanical Energy?
Energy in moving objects.
500
Lightning is an uncontrolled electric _______.
current
500
What happens when heat energy is added to water?
The liquid water evaporates and becomes a gas.
500
Sound waves are examples of ______________ waves.
compression
500
What does it mean to absorb light?
Light is being taken in by an object.
500
What is an electric circuit?
The path that an electric current flows through.
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