Intro to Chemistry
____________ changes when gravity changes.
what is weight
____________ changes often cause color changes, produce heat, and produce sound.
What is a chemical change?
Most things people use are ______________.
what is, compound machines?
waves travel fastest through ________.
what is solids?
_________ light causes sunburns.
what is ultraviolet?
________ are pure substances.
What are elements and compounds?
____________ forces combine to create a net force of zero.
what is balanced?
Lightning and running a dishwasher are both examples of ___________ energy.
What is electrical energy?
The ___________ of sound changes based on its medium.
what is speed?
if an electron is added to an atom, the atom has a _________ charge.
what is negative?
___________ make up all atoms.
what are protons, neutrons, and electrons?
Newton's third law says that for every action force,_________________.
what is, "there is an equal and opposite reactions force"?
________ is the temperature at which energy cannot get any lower.
What is absolute zero?
if you are close to the source of a sound, the ______ is greater.
what is intensity?
A _________ circuit happens when an alternative path is created for the current.
what is a short?
_______________ happens when a substance changes states from a liquid to a gas.
what is vaporization, evaporation, and boiling?
If you double the amount of force, the amount of acceleration _______________.
what is, doubles?
_________always moves from a warmer object to a colder object.
What is a wave?
light waves are different from other waves because they ____________.
what is, "do not need a medium to travel"?
a complete, unbroken path for an electrical current is called a/an ___________ circuit.
what is a closed circuit?
When a substance changes states from a solid directly to a gas, it goes through___________.
What is sublimation?
If you apply a large force to something but it does not move, _______________.
what is, "no work has been done"?
Particles in a __ have a high amount of kinetic energy and a high temperature.
what is lliquid?
Humans see different wavelengths of light as different _______________.
what is colors?
magnetic force is strongest at the magnet's __________.
what is poles?