Ancient Ideas of Matter
The Greek philosopher who proposed that water is the first principle of all things.
Thales
Anything that has mass and occupies space is called __________.
Matter
The state of matter with a definite shape and definite volume.
Solid
In solids, particles mainly __________ in fixed positions.
Vibrate
The philosopher who believed matter is composed of earth, water, fire, and air.
Empedocles
The amount of matter in an object.
Mass
The state of matter that has no definite shape but has definite volume.
Liquid
In liquids, particles __________ past one another.
Slide
The four basic "roots" of matter according to Empedocles.
Earth, Water, Fire, and Air
The space occupied by an object.
Volume
The state of matter that has neither definite shape nor definite volume.
Gas
In gases, particles move in fast, __________ motion.
Random
The philosopher traditionally credited as the founder of atomism.
Leucippus
The instrument commonly used to measure mass.
Balance
The high-energy state of matter made of ions and free electrons.
Plasma
Plasma contains charged particles called __________ and free electrons.
Positive ions
The philosopher who expanded the atomic theory by introducing the term atomos.
Democritus
The very low-temperature state where atoms behave as one quantum system.
Bose–Einstein Condensate (BEC)
Matter waves overlap in the __________ state.
Bose–Einstein Condensate (BEC)