Science Chapter 2 Study Guide Flashcards
Who first introduced the particle model of matter
Leucippus and democratus
Who famously oppose the particle model of matter
Aristotle
The constant random motion of particles in fluids caused by particle collisions
Brownian motion
The building blocks of all matter
Atoms
What does an atom consist of?
Protons, electrons, and neutrons
A distinct group of two or more atoms, conveniently bonded together
Molecules
The amount of matter in an object
Mass
What unit is mass measured in?
Gram
The measure of gravity acting on matter in an object
Weight
What unit is weight measured in?
SI unit
What changes based on location mass or weight?
Weight
Material made of only one kind of element or compound; not a mixture. It may be either an element or a compound.
Pure substance
A pure substance that consists of atoms with the same atomic number. Are the simplest of the pure substances
Element
A pure substance consisting of atoms of two or more different elements that are chemically combined. Atoms of a particular compound, always combine in the same proportion.
Compound
A physical combination of two or more substances in a changeable ratio
Mixture
A mixture that doesn’t have a uniform appearance since the combined substances are unevenly  distributed
Heterogeneous mixture
A mixture that has a uniform appearance throughout
Homogeneous mixture
What other name is given to a homogeneous mixture?
Solution
Do the particles in a solid move
Yes
States of matter are determined by the relationship between which two quantities
Kinetic energy of the particles, and the attractive  forces between them
List the properties of solids
Close together, vibrate in place, fix volume, fixed shape, low, compressibility, high density, and not a fluid
Solids with particles, arranged in regular repeating patterns
Crystalline solids
