Light Energy
What happens to light when it hits a smooth, shiny surface?
It reflects in a single, predictable direction.
Which energy form makes things feel warm or hot?
Heat Energy
What form of energy is produced when a guitar string is plucked?
Sound Energy.
What form of energy is produced by moving parts of machines or objects?
Mechanical energy.
Which form of energy powers a lamp, computer, or fan?
Electrical energy.
Why do you see your reflection in water on a calm day but not on a windy one?
When the surface is smooth, light reflects evenly; when it's rough, light scatters.
When the brakes on a bike or car are applied, what form of energy is produced by friction?
Heat Energy
How does sound travel?
In vibrations that move through matter.
What does an object have when it is being held above the ground?
Potential Energy
When food is digested, what type of energy is released?
Chemical energy.
A pencil looks bent when placed in a glass of water. What causes this illusion?
Refraction: light bends as it passes from air into water.
What is another term for heat energy?
Thermal energy
What does the sound wave look like if it is low?
See Answer
When an object falls what kind of energy does it have?
Kinetic Energy
What form of energy is needed for a fan to function?
Electrical energy.
How are shadows created?
Light goes in a straight line until it hits a surface and gets absorbed. If it cannot pass through, a shadow is created.
What color absorbs the most heat energy?
Black
What does the sound wave look like if it is high?
See Picture
What form of energy does a person use to pedal a bike?
Mechanical energy.
Besides food, what else stores chemical energy?
Batteries, coal, natural gas
Light travels fastest through which medium: water or glass? Why?
Glass, because it has the fewest particles to slow the light waves down.
What happens to the motion of particles when heat energy increases?
They move faster.
Which object cannot produce both sound and light energy: a TV, a firework, an alarm clock, or a fan?
Friction slows down objects that have _________ energy.
Kinetic
Fossil fuels contains stored energy. What is another word for stored energy?
Chemical energy.