lightLight allows us to see objects.

Light comes from different light sources such as a lamp, a flashlight, and the sun.

light sourcethe starting point of light

Examples: lamp, flashlight, sun

path of light

the direction light travelsLight travels in a straight path in materials

such as air, glass, and water.

straight path

goes in one direction without any curves, bands, or angles

evidence an observation or information from data that gives support

or proof of ideas and conclusions

light absorption

the light that is taken in by an object

This creates an increase in temperature.

light reflection

the return of light rays from a surface

shadowa dark area that is formed when light is blocked by

an object

variablesthe properties of things

that can be changed in an investigation

Celsiusthe unit of measure for

temperature0 degrees = freezing 100 degrees = boiling

sound energy energy associated with the

vibrations that produce sound It can change things.

soundproduced by vibrating objects and vibrating

columns of air

pitcha property of sound that is

produced through vibrations

sound sourcethe vibration or vibrating object that produces the

sound

vibrationsregular back and forth movements of objects

Fast Vibrations = high pitchSlow Vibrations = low pitch