New Vocabulary

Explain why a sound wave with a large amplitude is more likely to damage your hearing than one with a small amplitude.

A wave with more amplitude will have more energy then one with a small amplitude and since there is so much energy it could possibly damage your hearing.

Describe the movement of a floating object on a pond when struck by a wave

All the energy will move towards the boat

Describe how the frequency of a wave changes as its wavelength changes.

As the wavelength changes, the frequency changes by going slower because they waves are bigger.

Explain why the statement "The speed of light is 300 million m/s" is not always correct.

Because depending on where you are that could be different.

Explain why a sound wave can't travel from a satellite to Earth

Because sound can travel through air to the next object but in space there is no air, not allowing sound to travel.

How is it possible for a sound wave to transmit energy but not matter?

Because sound waves transmit the sound and depending on how loud the sound is, the more energy it has but it can't move objects (matter).

Explain the differences between the waves that make up bright, green light and dim, red light.

Each one is either bigger or smaller then the other.

Wavelength

For a transverse wave, wavelength is the distance from the top of one crest to the top of the next crest, or from the bottom of one trough to the bottom of the next trough. For a compressional wave, the wavelength is the distance between the center of one compression and the center of the next compression, or from the center of one rarefaction to the center of the next rarefaction. Help determine color of light or pitch of noise

Compare and contrast a transverse wave and a compressional wave. How are they similar and different?

In a compressional wave matter in the medium moves forward and backward along the same direction that the wave travels but in a transverse wave the wave energy causes the matter in the medium to move up and down or back and forth at right angles to the direction the wave travels.

Compare and contrast a mechanical wave and a electromagnetic wave.

Mechanical waves use matter to move energy and electromagnetic waves cannot move matter, only energy.

Amplitude

The amplitude of a transverse wave is one-half the distance between a crest and a trough, as shown in Figure 6. In a compressional wave, the amplitude is greater when the particles of the medium are squeezed closer together in each compression and spread farther apart in each rarefaction.

Frequency

The frequency of a wave is the number of wavelengths that pass a given point in 1 s. The unit of frequency is the number of wavelengths per second, or hertz (Hz). Recall that waves are produced by something that vibrates. The faster the vibration is, the higher the frequency is of the wave that is produced Determine color of light or pitch of noise

State what accounts for the time difference between seeing and hearing a fireworks display.

This happens because light travels much faster in air than sound does.

Cause and Effect Relationships

WHEN WAVELENGTH INCREASES/DECREASES... Amplitude ..... Frequency ..... WHEN AMPLITUDE INCREASES/DECREASES Amplitude ..... Frequency ..... Energy ... WHEN FREQUENCY INCREASES Amplitude ..... Frequency .....

What is a wave?

Waves transfer energy, but do not transfer matter.

Electromagnetic Waves

• Electromagnetic waves can travel through empty space. • The Sun emits different types of electromagnetic waves, including infrared, visible light, and ultraviolet waves.

Wavelength

• For a transverse wave, wavelength is the distance from crest to crest, or from trough to trough. • For a compressional wave, wavelength is the distance from compression to compression, or from rarefaction to rarefaction.

Amplitude

• In a transverse wave, the amplitude is one-half the distance between a crest and a trough. • The larger the amplitude, the greater the energy carried by the wave.

Mechanical Waves

• Mechanical waves require a medium in which to travel. • When a transverse wave travels, particles of the medium move at right angles to the direction the wave is traveling. • When a compressional wave travels, particles of the medium move back and forth along the same direction the wave is traveling. • Sound is a compressional wave.

Frequency

• The frequency of a wave is the number of wavelengths that pass a given point in 1 s. • For waves that travel at the same speed, as the frequency of the wave increases, its wavelength decreases.