Understanding
Physical matter exists in the form of _________ in constant motion
Particles
A single, pure substance
Element
Particles in this state are in slow, fixed in place movement; the particles are closely packed together
Solid
A usually reversible change in an object
Physical Change
Anything that occupies space and has mass
Matter
The amount of matter in an object
Matter
Two different elements that are chemically combined
Compound
Particles in this state are in motion but stay close together; the object in this state changes to fit their container
Liquid
A usually non-reversible change in an object or substance; this changes it on the molecular level
Chemical change
The basic building block of all matter
Atom
Weight
Mixture
Particles in this state are in rapid motion, and no longer connected to each other; volume changes to fit container
Gas
The law of conservation of matter states this
That energy cannot be created or destroyed
Constant, random motion of particles found in fluids
Brownian motion
The name for two or more atoms together
Molecule
A mixture in which you cannot distinguish between the parts mixed together
Homogeneous Mixture
Exists as a fourth state of matter, and acts as a differing property from the others; makes up the matter of stars
Plasma
Double Up
These are the changes that involve gaining energy
Sublimation, melting, and vaporization
The change of state when a solid forms directly from a vapor
Deposition
Atoms consist of these three parts
Electron, Proton, Neutron
A mixture in which you can distinguish between the parts mixed together
Heterogeneous mixture
Liquids that have a resistance to flow are said to have a high _________
Viscosity
Double Up
These are the changes that involve losing energy
Deposition, condensation, and freezing
The change when a gas forms directly from a solid
sublimation