Show:
Forms of energy
Electrical energy
Sound energy
Light energy
Energy change forms
100
Which of these is an example of potential energy? a. roller coaster at the top of the track. b. one horse runs faster than another horse c. a skier rides a chairlift to the top of the mountain
a. roller coaster at the top of the track
100
It is the path of a controlled electrical current
What is a circuit?
100
something that makes a loud sound vibrates __________?
at a high frequency
100
When you look into a mirror, you see your ____________?
reflection
100
Give an example of how energy is uded to lift an object.
- lift people in an elevator - lift a spoon into your mouth
200
Name 3 different types of energy.
a. potential b. kinetic c. sound d. chemical e. electrical f. light
200
Why is a switch helpful?
A switch allows you to open and close a circuit without disconnecting it.
200
What does volume tell you about a sound?
how loud or soft it is.
200
Why does an orange look orange?
An orange absorbes all colors of light but orange, which it reflects.
200
What is energy
the ability to do work or cause change
300
what does pitch tell you about a sound?
how low or high a sound is
300
You buy a blue shirt. Which of these is true about the shirt? a. the shirt refracts any light b. the shirt reflects blue only c. the shirt reflects all colors of light
b. the shirt reflects blue
300
Why do electric wires have a covering of plastic or rubber?
The coving makes the wire safe to handle. Electrical cannot move through the plastic or rubber and shock you.
400
A battery operated flashlight is not glowing. Suggest two reasons why this might be the case.
1. open current 2. needs a new battery
400
Why would one string instrument have a higher pitch than another? a. the strings are longer and thicker b. the strings vibrate more slowly
a. the strings are longer and thicker
500
Explain the movement of electricity through a closed electric circuit made of a battery, wire, and a bulb.
Electric current flows from the negative part of the battery throught the wire. The current flows through the bulb and through more wire toward the positive part of the battery.