Sound
Anything that can be heard and is a form of energy.
Sound
The bouncing back of light waves when they hit an object with a very smooth and shiny surface, like a mirror.
Reflection
In ______ sound travels the fastest because the molecules are close together.
Solids
The loudness or softness of sound.
Volume
The ability to make things move. It is needed to start the vibrations that make sound.
Energy
When sunlight is intercepted by a drop of water in the atmosphere, and it is refracted, reflected, and then refracted once more it creates this.
Rainbow
What is it called when a sound wave bounces off a substance and creates the same sound?
An Echo
The number of vibrations an object makes in a certain amount of time. It is measured in Hertz.
Frequency
The back and forth movements of an object. They can be powerful, weak, fast or slow.
Vibrations
When light rays are blocked by an opaque object, this is cast.
Shadow
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Vibrations that make sound.
Sound Waves
This material lets some light pass through but light scatters in all directions.
Translucent object
In ______ sound travels the slowest because the molecules are the farthest apart.
Gases
The highness or lowness of a sound.
Pitch
Loud and constant noise.
Noise Pollution
The primary colors of light.
Red, Green and Blue
List the steps in the process of how we hear.
1.The sound waves enter the ear
2. These make the eardrum vibrate.
3. The sounds pass through several small bones in the ear. The three tiny bones in the middle ear are the malleus, incus, and stapes:
Malleus: Also known as the hammer, this bone is attached to the eardrum
Incus: Also known as the anvil, this bone is in the middle of the chain of bones
Stapes: Also known as the stirrup, this bone is attached to the oval window, which connects the middle ear to the inner ear
These bones are called auditory ossicles. When sound waves enter the ear, they cause the eardrum to vibrate, which in turn moves the ossicles.
4. The ossicles then pass the vibrations to the cochlea, the hearing organ in the inner ear. The cochlea contains hair cells that send electrical signals along the auditory nerve.
5. The signals pass through our auditory nerve and into our brain.
6. The brain interprets the signals to tell us what we have heard.
Amplitude is a measure of how loud a sound wave is and it is measured in units called ______.
Decibles