.............  waves can travel through empty space, but other wave types need

a material to travel through.         

.........is the greatest height of a wave from its resting position

.........is the distance between similar points on wave 

…………………….. is number of waves repetition in a certain amount of time.

A ………………… wave is a wave that moves perpendicular to the direction of the particles.

Transverse waves have a ………………… or top point

1-  Transverse waves have a ……………… at bottom point.

 A………………… wave is one that moves in the same direction as the particles .

These waves are ........

Light waves can travel through empty space, but otherwave types need a material to travel through.

 Light waves even travel faster than sound waves

The greatest height of a wave from its resting position is called its frequency.( )

If a drum head moves back and forth very quickly, it makes waves with lower frequency.

1-  Longitudinalwaves  compress and expand as they travel. ( )

A wave gets smaller as it moves outward.( )

•       ………………… is the amount of time it takes for a wave to complete one back and-forth motion

•       Waves with high frequencies have ………………… wavelengths.

•       Frequency,amplitude, and wavelength follow a …………………

………………… is a wave that is made when a line of matter is disturbed.

What happens to the circles of waves as they move outward?

What is it called when waves add together as they    pass through each other?

 a. b. c. 

When the crests of two waves meet, what happens?   

When two crests meet, the wave becomes………………… for a moment.

Waves with high frequencies have ……………… wavelengths.

The frequency, amplitude, and wavelength of waves follow a pattern.

Oscillation means moving back and forth between two points. ( )

A swing is an example of something that oscillates.

Waves with high frequency have longer wavelengths.

Waves appear only when a disturbance happens in a medium. ( )

Throwing a stone into water creates circular waves. ( )

Circular waves move in straight, parallel lines. ( )

The distance between circular waves changes as the circles get larger. ( )

Light waves are longitudinal waves.    

1-   Light can travel only through a medium       (      )

When rays refract,they bounce off a surface and move in a new direction.                                   

Certain cells in the lens determine the differences between the Wavelengths of light

People can see gamma rays.                                (      )

Dense materials such as bones, absorb more x-rays than other materials around them

 It connects the eyes to the brain.

Matter that doesn’t let light pass through it.

Matter that lets almost all light pass through it.

Matter that lets some light pass through it. 

………………… is the black hole in the center of the eye that lets light in.