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PS Ch. 10/11 Review
DHS PS CH 10/11 Test Review (online)
| Question | Answer |
|---|---|
| What type of waves does matter in the medium move back and forth at right angles to the direction the wave travels? | tranverse |
| A material through which a wave transfers energy is called a? | medium |
| An example of a wave is? | earthquake |
| Sound would not travel through this type of medium? | vacuum |
| What type of waves are sound waves? | compressional |
| A repeating disturbance that transfers energy through matter or open space is a? | wave |
| What do waves carry? | energy |
| In what type of waves does matter in the medium move back and forth and in the same direction the wave travels? | compressional |
| What type of wave can travel through outer space? | light |
| A combination of compressional and transverse waves are called? | seismic waves |
| What is a measure of the energy in a wave? | amplitude |
| What are the highest points of a transverse wave called? | crests |
| _________ is how many wavelengths pass a fixed point each second? | frequency |
| The lowest points of a transverse wave are called? | troughs |
| What is the less dense region of a compressional wave called? | rarefaction |
| Transverse waves do not have? | rarefactions |
| As a frequency increases, wavelength _____? | decreases |
| a repeating disturbance or movement that transfers energy throughmatter or space is called a? | wave |
| Molecules pass energy on to? | neighboring molecules |
| All waves are produced by something that? | vibrates |
| A material through which a wave travels is called a? | medium |
| A medium may be what type of matter? | solid, liquid, or a gas |
| What type of waves do not need a medium to travel through? | light waves |
| What type of waves can travel only through matter? | mechanical waves |
| What type of waves does the matter in the medium move back and forth at right angles to the direction that the wave travels? | transverse waves |
| What is an example of a transverse wave? | water waves |
| What type of waves does the matter in the medium move in the same direction that the wave travels? | compressional waves |
| An example of a compressional wave is? | sound waves |
| What are ways that waves differ? | *how much energy they carry *how fast they travel *how they look |
| What type of waves have crests and troughs? | transverse waves |
| The highest point in a wave is called? | crests |
| The lowest points in a wave is called? | troughs |
| What type of waves have compressions and rarefactions? | Compressional waves |
| The dense regions in waves are called? | compressions |
| The less dense regions in waves are called? | rarefactions |
| The distance between one point in the wave and the nearest point just like it is called? | wavelength |
| How many wavelengths pass a fixed point each second is called? | frequency |
| Frequency is expressed in? | hertz (Hz) |
| As frequency increases wavelength? | decreases |
| The frequency of a wave equals the rate of? | vibration of the souce that creates it |
| How fast a wave moves forward is called? | wave velocity |
| wave speed equals? | wavelength x frequency |
| Light waves travel _____ than sound waves? | faster |
| Sound waves travel faster in this than in a gas? | liquids and solids |
| Light waves travel faster in _____ than empty space than in liquids and solids? | gases |
| A measure of the energy in a wave is called? | amplitude |
| The more energy a wave carries, its amplitude will be? | greater |
| Amplitude of compressional waves is related to how? | tightly the medium is pushed together at the compression |
| The denser the compressions, the ______ the amplitude is and the more energy the wave carries | larger |
| The less dense the rarefactions, the ______ the amplitude and the more energy the wave carries. | larger |
| In a thunderstorm, why do you see the lightning before you hear the thunder? | Light waves travel much faster than sound waves |
| When does reflection happen? | when a wave strikes an object and bounces off of it |
| What types of waves can be reflected? | all waves |
| The angle of incidence of a wave is always equal to the angle of? | reflection |
| An imaginary line perpendicular to reflective surface is called? | normal |
| The angle formed by the wave striking the surface and the normal is called? | angle of incidence |
| The angle formed by the reflected wave and the normal is called? | Angle of reflection |
| The bending of a wave caused by a change in its speed as it moves from one medium to another is called a? | refraction |
| The greater the change in speed is, the wave bends? | more |
| When a wave passes into a material that slows it down, the wave is bent how? | toward the normal |
| When a wave passes into a material that speeds it up, the wave is bent how? | away from the normal |
| An object that causes a wave to change direction and bend around it is called a? | diffraction |
| If the obstacle is smaller than the wavelength, the wave diffracts? | around it |
| If the obstacle is much larger than the wavelength, the wave diffracts? | not at all, it reflects |
| The larger the obstacle is compared to the wavelength, the waves will diffract? | less |
| The ability of two or more waves to combine and form a new wave is called? | interference |
| Waves pass right through each other and continue in? | their original direction |
| New, or composite, waves exist only while the two original waves continue to? | overlap |
| This is when waves add together? | constructive interference |
| This is when waves subtract from each other? | destructive interference |
| What type of wave is a wave pattern that stays in one place? | standing waves |
| What type of waves from when waves of equal wavelength and amplitude that are traveling in opposite directions continuously interfere with each other? | standing waves |
| The places where two waves always cancel each other is called? | nodes |
| What is the ability of an object to vibrate by absorbing energy at its natural frequency? | resonance |
| T/F: AM radio waves have longer wavelengths than FM radio waves making their reception much better around tall buildings and mountains | True |
| T/F: Refraction occurs when an object causes a wave to change direction and bend around it. | False |
| Reflection occurs when a wave? | strikes an object and bounces off of it |
| If you stand next to a swimming pool and see an object under water, it will seem to be? | closer to the surface than it really is |
| What is an imaginary line perpendicular to the surface of a medium where a wave strikes it? | normal |
| What happens when waves bend around a barrier? | diffraction |
| What is the process in which two waves overlap and form a new wave? | interference |
| When a wave pattern forms when waves of equal wavelength and amplitude, but traveling in opposite directions, continuously interfere with each other it is a? | standing wave |
| The ability of an object to vibrate by absorbing energy at its natural frequency is called? | resonance |
| Sounds are produces by? | vibrations |
| What type of waves are sound waves? | compressional |
| Two types of regions that make up compressional waves are? | compressions and rarefactions |
| The matter through which all sound waves travel is called? | a medium |
| Sound waves cannot travel in? | empty space |
| Sound will travel fastest in what type of medium? | solids |
| How does temperature of a medium affect the speed of sound waves? | as the temperature of a substance increases, sound waves in it move faster |
| In the human ear, sound waves are gathered in the? | outer ear |
| What is the spiral-shaped structure filled with liquid in the human ear? | cochlea |
| Sound will travel the slowest in what type of meduim? | air |
| What is the amount of energy that flows through a certain area in a specific amount of time called? | intensity |
| The human perception of sound intensity is called? | loudness |
| The intensity of sound is measure din units called? | decibels |
| The human perception of sound frequency is called? | pitch |
| Waves that have sound frequencies above 20,000 Hz are called? | ultrasonic |
| The change in pitch due to a moving wave source is called? | the Doppler effect |
| As an ambulance races toward you and then past you, what would the pitch of its siren do? | higher then lower |
| If you are lying on a raft, and you notice that the number of waves that go past the raft increases, you also find that the distance between each crest? | decreases |
| What type of waves are seismic waves | both transverse and compressional |
| If the intensity of a sound decreases, what else decreases? | loudness |
| When you squeeze together the coils of a spring and then release the, you a creating what type of wave? | compressional |
| A tuning fork starts to vibrate when a certian note is played on the piano. This is an example of? | resonance |
| The intensity of a sound describes? | it's loudness at a particular distance |
| Frequency is best explained as? | the number of wavelengths that pass a point per second |
| The way your brain interprets the intensity of a sound is called? | loudness |
| Sound travels in what type of wave? | compressional |
| Resonance refers to an effect in which the ? | vibration of one object causes another object to vibrate at natural frequencies |
| How does temperature of a medium affect the speed of sound waves? | as the temperature of a substance increases, sound waves in it move faster |
| A wave will travel only as long as it has what to carry it? | energy |
| For the Doppler effect to occur what must happen? | either source or listener must be moving |
| For a given wave, if the frequency doubles, the wavelength? | is halved |
| The energy a wave carries is measured by it's? | amplitude |
| When the crest of one wave passes through the trough of another wave, what takes place? | destructive interference |
| The pitch of a sound is most closely related to the? | frequency of vibrations |
| The less-dense region of a sound wave is a? | rarefaction |
| Because water waves have both horizontal and vertical motion, the are considered to be what type of waves? | transverse and compressional |
| An example of a transverse wave is? | an ocean wave approaching the shore |
| When a sound wave strikes your eardrum, it causes forced vibrations that are transferred to the? | hammer, anvil, and stirrup |
| You are creating a wave on a spring. If you start shaking the spring more slowly, the wavelength of the resulting wave will? | increase |
| The speed of sound in this medium is greater than the speed of sound in water? | steel |
| The unit used to measure frequency is called? | hertz |
Created by:
basmith
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