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DHS PS Ch. 9
DHS PS Ch. 9 - Waves (2015)
| Question | Answer |
|---|---|
| What type of waves does matter in the medium move back and forth at right angles to the direction the wave travels? | transverse |
| A material (solid, liquid, or gas) through which a wave transfers energy is called a? | medium |
| An example of a wave through the ground is called a _____? | seismic wave |
| Sound would not travel through this type of medium? | vacuum |
| What type of waves are sound waves? | longitudinal |
| A repeating disturbance that transfers energy through matter or open space is a ______? | wave |
| All 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? | longitudinal |
| What type of wave can travel through outer space? | light |
| An example of a combination of longitudinal and transverse waves that cause things to bob in a circular motion are called ______ ? | water 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 |
| What type of waves can travel only through matter? | mechanical waves |
| What is an example of a transverse wave? | a wave on a rope |
| What type of waves does the matter in the medium move in the same direction that the wave travels? | longitudinal waves |
| An example of a longitudinal wave is? | sound waves |
| The highest point in a wave is called? | crests |
| The lowest points in a wave is called? | troughs |
| 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, the 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 |
| Light waves travel _____ than sound waves. | faster |
| Sound waves travel faster in ________ than in a gas. | liquids and solids |
| Light waves travel faster in _____ and empty space than in liquids and solids. | gases |
| 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 _____ a wave bends. | more |
| When a wave passes into a material that slows it down, the wave is bent _________. | toward the normal |
| When a wave passes into a material that speeds it up, the wave is bent __________. | 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 larger than the wavelength, the wave _______. | reflects instead of diffracting |
| 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 |
| 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 |
| The ability of an object to vibrate by absorbing energy at its natural frequency is called? | resonance |
| 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 |
| When you squeeze together the coils of a spring and then release the, you a creating what type of wave? | longitudinal |
| A tuning fork starts to vibrate when a certian note is played on the piano. This is an example of? | resonance |
| Frequency is best explained as? | the number of wavelengths that pass a point per second |
| Resonance refers to an effect in which the ? | vibration of one object causes another object to vibrate at natural frequencies |
| A wave will travel only as long as it has what to carry it? | energy |
| For a given wave, if the frequency doubles, the wavelength? | is halved |
| The energy a wave carries is measured by it's? | amplitude |
| 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 unit used to measure frequency is called? | hertz |
Created by:
basmith
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