Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
What is sound? |
Energy that is all around us |
|
|
What must be present for sound to be produced? |
matter |
|
|
How do musical instruments make sound? |
They vibrate and resonate |
|
|
How is sound produced |
vibrations
|
|
|
How does sound travel? |
waves |
|
|
What are the three basic parts of a wave? |
crest, trough, wavelength |
|
|
Which is the highest point of a wave? |
crest |
|
|
Which is the lowest point of a wave? |
trough |
|
|
What is a wavelength? |
Distance between twho side by side crests |
|
|
What makes a sound become higher? |
frequency increases |
|
|
What do we call the number of vibrations in a unit of time? |
frequency |
|
|
What do we call the highness or lowness of sound? |
pitch |
|
|
Of the three states of matter, which do sound waves travel through the slowest? |
gas |
|
|
Of the three states of matter, which do sound waves travel through the fastest? |
solid |
|
|
Why doesn't soudn travel quickly through gas? |
Molecules are farther apart
|
|
|
Why does sound travel faster through a solid than gas or liquid? |
Molecules are closer together |
|
|
How do humans, dogs, and bats make sounds to communicate? |
We move air across vocal cords |
|
|
How do whales make sounds to communicate? |
Pass air through sacs in their heads |
|
|
What is hearing? |
Detection of sound |
|
|
What are the two kids of waves that affect our lives every day? |
sound waves and light waves |
|
|
How are sound and light waves similar? |
Both sound waves and light waves have crests, troughs, and wavelengths |
|
|
What is the difference between a crest and a trough? |
Crest is on the top of the wave and the trough is the bottom of the wave |
|
|
How are waves measured? |
By wavelengths, from crest to crest or trough to trough |
|
|
What is sound discrimination? |
being able to tell one sound from another |
|
|
What is a quick back and forth movement called? |
vibration |
|
|
What is amplitude? |
The loudness (volume) of a sound |
|
|
What type of matter does sound travel loudest through and why? |
Sound travles loudest through solids because the particles in a solid are close together |
|
|
Pitch is measured it... |
hertz |
|
|
Volume is measured in... |
decibles |
|
|
What is resonance? |
The strengthening of a sound when the walls of the cavity vibrate at the same speed as teh sound waves in the cavity. For example, string, percussion, and brass instruments. |
