Electricity
What is a flow of electric charge that regularly reverses its direction?
Alternating Current
Using a lever helps to make work ______
easier
True or False: Motion is relative
True
What waves have the largest wavelengths?
Radio waves
Poles that don't move while the planet spins are called the _______
Axis
What is a device used to store an electric charge?
Capacitor
What simple machine on a boat would lift a sail?
A pulley
What are the 3 types of motion?
Uniform motion, accelerated motion, and uniform circular motion
What measures the height of a wave from the equilibrium line to the crest of the wave?
Amplitude
Name the four terrestrial planets
Mercury, Venus, Earth, and Mars
What can 50 amps power?
AC, electric oven, etc
What two factors are required for work to be done?
Force & Movement
A person applies brakes to his car to make a turn. What is this an example of?
Accelerated Motion
The waves with the highest frequencies have the smallest ______
wavelengths
What are Saturn's rings made of?
Ice and small moons
True or False: A GFI (Ground Fault Interrupter) should be placed near water
True
When using an inclined plane, less force is required to move an object but you will have to move it at a greater ______
distance
A system of objects that are not moving with respect to one another is ______
the frame of reference
List the colors of the visible light spectrum by decreasing wavelength
ROYGBIV
Broken planets or planets that never formed make up the _______
Asteroid Belt
What are wet cells, transformers, dry cells, lithium ions, and generators an example of?
Power Sources
In order to lift a heavy object with a lever, where is the best place to put the load?
Closer to the fulcrum
All changes in motion are caused by _____
force
The frequency of a siren increasing as it comes near you and diminishing as it passes away is an example of _______
The Doppler Effect
How long does it take for light to travel from the sun to the Earth?
8 minutes