Sound Definitions
Sound is made when particles ______
Vibrate
This word means to "give off" something (light)
Emit
What is the best conductor of sound (which medium does sound travel the fastest in)?
Solid
What two things are needed to make a shadow?
A source of light and an opaque object to bock the light from going through
When light passes through something, the light rays bend. This is called _____
Refraction
The highness or lowness of a sound is called _______
Pitch
This word means "to bounce off of a surface"
Reflection
The sound of rain gently falling is an example of a ______ sound
Pleasant
The size of the shadow depends on the size of the object. Larger objects will create ______ shadows
A good reflector has this type of surface
Smooth and shiny
The size of sound waves (how big or small the soundwaves are) is called ______
Amplitude
Something that does not let any light pass through it is called _____
Opaque
A sound wave with a HIGH frequency (lots of waves per second) will sound ______
Higher or high-pitched
When a light source is close to an object, the shadow will be _____
Bigger. As the object gets further away from the light source, the shadow will get smaller.
What is an example of a good reflector?
Mirror, coke can, metal, etc.
The number of waves that are produced in ONE second is called _______
Frequency
Materials that let light pass through so an object can bee seen clearly on the other side is said to be ______
Transparent
A sound wave with a low frequency (not many waves per second) will sound ____
Lower or low-pitched
When the sun is low in the sky in the morning and evening, shadows are __________
Longer and wider
What happens when you shine white light through a prism?
A material that allows some light to pass through it, but scatters the light in the process so that images are not clear, is called _____
Translucent
What is the worst conductor of sound (where soundwaves travel the slowest in)?
Air
When the sun is high in the sky in the middle of the day (noon), the shadows are _______
Shorter and skinnier
What colour of shirt should you wear to stay cool on a hot summer day and why?
White, because it is very reflective - it reflects all the colour wavelengths!