1
Sound is best described as...
A mechanical wave created by vibrations that travels through a medium
Part of a sound wave where particles are spread farther apart.
Rarefaction
Two or more atoms chemically joined together
Molecule
Is Carbon dioxide (CO₂) an atom or a molecule?
Molecule
During a thunderstorm, you see lightning before you hear thunder because...
Light travels faster than sound
Measure of wave height (energy); relates to loudness.
Amplitude
Is rust forming on a nail a chemical or physical change?
Chemical
The negatively charged and smallest of the 3 main subatomic particles (pieces inside of an atom) that exists in a "cloud" around the nucleus.
Electron
Why does sound travel fastest in solids, slower in liquids, and slowest in gases?
Solids have stronger bonds and particles are closer together
The positively charged subatomic particle (pieces of an atom) that is in the nucleus.
Proton
Measure of how many wave cycles pass a point each second; relates to pitch.
Frequency
Unit used to measure sound intensity/volume.
Decibel (dB)
Frequency of a sound wave is most closely related to what other quality of sound?
Pitch (High or Low sound)
Sound with a frequency above the human hearing range.
Ultrasonic
What is it called when a force causes an object to change shape?
Deformation
The neutral subatomic particle (pieces in an atom) that exists in the nucleus of an atom.
Neutron
Is water freezing in an ice tray a chemical change or a physical change?
Sound waves cannot travel in a vacuum because they need particles to bump into. This is the same reason heat from a campfire feels hottest close to the flames where there are more particles to collide. This word describes how energy moves by particles bumping into each other.
Conduction
Part of a sound wave where particles are squeezed close together.
Compression
Bigger amplitude in a sound wave means louder sound and more energy in the wave. In chemistry, this is similar to having more reactants or a stronger reaction. This is the quantity that both a tall sound wave and a big exothermic reaction have more of.
Energy
What famous radioactive element was used in paint and led to extreme health problems for the women factory workers who used that paint.
Radium
The smallest piece of an element that still has that element’s properties
An Atom