Like a tennis ball, ________ __________ bounce off a surface at the same angle that they hit it.
What are light waves?
100
Sound travels through all ________ in a similar way.
What is matter?
200
Sound is a form of this.
What is energy?
200
A sound wave that carries a lot of energy has a ______
intensity. A sound wave the carries less energy has a ________ intensity.
What is higher and lower?
200
This is the major source of light on Earth.
What is the sun?
200
A flat, smooth mirror.
What is a plane mirror?
200
How to calculate the distance of a storm.
What is count the number of seconds after a flash of lightning until you hear the thunder and divide the number of seconds by 3 sec./km?
300
Sound waves move out from the object in all directions. As the sound waves travel farther from the object, they become
_______________.
What is weaker?
300
A unit that measures the intensity of sound.
What is a decibel?
300
Small bundles of energy that make up light.
What are photons?
300
A mirror that curves in at the middle.
What is a concave mirror?
300
Suppose you see a flash of lightning. You find that it takes 12 seconds until you hear the thunder. How far away is the storm?
What is 4 kilometers?
400
To move rapidly back and forth.
What is vibrate?
400
The sound of rustling leaves would be measured at about 20 decibels. The roar of a jet engine would be approximately this many decibels.
Needs to be within 15 decibels.
What is 135 decibels? (will accept 120-150)
400
The colors of the visible spectrum always appear in this order.
What is red, orange, yellow, green, blue, indigo, and violet?
400
The point where reflected light rays from a concave mirror come together in front of the mirror.
What is a focal point?
400
A method of using sound to measure distances under water.
What is sonar?
500
If you strike a tuning fork, you will not see it vibrate. But you will hear the sound it makes. You can see evidence of sound waves by doing this with the tuning fork.
What is placing the end of the tuning fork that has been struck into a small container filled with water and noticing water splashing out of the container?
500
The unit used to measured frequency of a sound.
What is Hertz?
500
A clear piece of glass or plastic that is shaped like a triangle and can be used to separate white light.
What is a prism?
500
A mirror that curves outward at the middle.
What is a convex mirror?
500
The bending of a wave as it moves from one material to another.