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| The lowest parts of a transverse wave are called ______ |
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| In longitudinal waves in a spring, the parts where the coils are close together are called _____ |
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| Mechanical waves form when a source of energy causes a medium to _____ |
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| ____ is a disturbance involving the transfer of energy from place to place. |
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| A _____ is material through which a wave travels |
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| The higher the frequency, the ___ the wavelength. |
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| How can you tell if a longitudinal wave has a high amplitude? |
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Definition
| The compressions are close together |
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| The _____ energy a wave has, the greater its amplitude |
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Definition
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| ____ is the maximum distance the medium vibrates from the rest position |
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| The frequency of a wave is measured as how often it repeats or reoccurs. T or F |
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| When a flashlight is held in the normal position over water, the light waves appear to bend in water. T or F |
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| Reflection occurs because light bends when it enters water. T or F |
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| When the crest of one wave overlaps the trough of another wave, ___ can occur. |
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| Refraction occurs when a wave _______ |
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Definition
| bends due to a change in speed |
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| If the angle of incidence is 45 degrees, the angle of reflection would be 90 degrees. T or F |
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| Sound travels as a _____ wave |
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Definition
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| What is the most common medium sound travels through? |
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Definition
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| Which substance is stiffer - air or water? |
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| Sound travels the fastest in _____ |
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Definition
| solids - particles are closer together |
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| The sound from a marching band travels ____ when the air temperature is 30 degrees Celsius than when the temperature is 20 degrees Celsius |
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| A 90 dB sound is ____ times more intense than a 60 dB sound. |
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| According to your book, as a fire truck goes by, the pitch of the siren ____ |
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| According to your book, the waves in front of a moving sound source has a ____ wavelength. The waves behind a moving sound source has a ____ wavelength. |
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Definition
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| The intensity of a sound wave ____ with distance |
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Definition
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| _____ depends on the energy and the intensity of a sound wave. |
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Definition
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Term
| The three sections of the ear are ____ |
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Definition
| outer, middle and inner ear |
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Term
| The outer most part of your ear looks like a ____ |
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Definition
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| What is the name of the nerve that sends messages from your ears to your brain? |
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Ear damage can occur in which of the following situations?
a. loss of hair cells in the cochlea
b. damaged or punctured eardrum
c. extended exposure to loud sounds
d. all of these |
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Definition
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Term
| Both hearing aids and cochlear implants can improve a person's ability to hear. T or F |
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Definition
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Term
| To find food and navigate, dolphins use ________ |
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Definition
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Term
| Through their jawbones, dolphins sense reflected ____ |
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Definition
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| Animals and people gather information by using sound's ability to ____ |
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Definition
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| Sound waves with frequencies above the normal range of human hearing are called ______ |
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| Animals such as bats can send out pulses of radio activity to help navigate. T or F |
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| Electromagnetic waves come from the sun. T or F |
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Definition
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| Electromagnetic waves travel at the speed of sound. T or F |
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Definition
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| Electromagnetic waves have different wavelengths and frequencies. T or F |
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Definition
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| Radio waves have the lowest frequency and the lowest wavelength on the electromagnetic spectrum. |
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Definition
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| Electromagnetic waves need a medium to travel. T or F |
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Definition
| False - space has no medium |
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Term
| A material that reflects or absorbs all the light that strikes is called ________ |
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Definition
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| The three colors that can be used to make any other color are ____ |
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Definition
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Term
| What are the primary colors of pigment? |
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Definition
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| The primary colors of light are __ |
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Definition
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Term
| Mixing the primary colors of pigment in equal amounts gives you ______ |
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Definition
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| A plane mirror produces an image that is real T or F |
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Definition
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| A convex mirror produces an image that is larger than the actual object T or F |
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Definition
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Term
| A plane mirror has a ____ |
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Definition
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Term
| A convex mirror curves ____ and a concave mirror curves ____ |
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Definition
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| A(n) ____ image is right side up. |
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Definition
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Term
| For a rainbow to form, light must be _______ |
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Definition
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Term
| The type of image formed by a lens is determined by _____ |
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Definition
| The shape of the lens and position of the object in relationship to the focal point |
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Term
| A convex lens acts like a ____ mirror. A concave lens acts like a ____ mirror. |
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Definition
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Term
| A ____ lens is thicker in the middle. A____ lens is thicker at the edges. |
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Definition
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Term
| A magnifying glass is an example of a _____ lens |
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Definition
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Term
| see distant objects clearly, but nearby objects are a blur |
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Definition
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| Cells in the retina that respond to small amounts of light are called __ |
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Definition
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Definition
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| layer of cells that line the inside of the eyeball |
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Definition
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| carries signals from the eye to the brain |
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