Studied by 29 people
Observing
noticing something by using your senses
Substance
anything that has mass and takes up space
Matter
anything that has mass and takes up space
Properties of a substance
unique characteristics of a substance
Density
how much matter is packed into a given area
Particle
a small piece of matter
Sound
energy that is created by vibrations
Sound frequency
the measure of the speed of the vibrations
Pitch
the highness or lowness of a sound, caused by frequency
Wavelength
the distance between one full wave
Amplitude
the height of a wave
Light
a form of energy that travels in waves
Visible spectrum
all colors of light seen with the naked eye
Reflect
to bend back light or heat
Absorb
to soak up or take in
Atom
smallest particle of a substance that still has the characteristics of the substance
Molecule
a particle that is made up of atoms
Photosynthesis
the production of glucose and oxygen by plants
Organism
a living thing
Note 
Flashcard (32)