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a change that occurs when a substance changes composition by forming one or more new substances (rusting, changing color, burning)
2 or more atoms attached together in a specific geometrical arrangement; come in different shapes and patterns and are made up of atoms
science that seeks to understand behavior of matter by studying behavior of atoms and molecules
particles closely packed, but have some ability to move around; fixed volume but not shape, incompressible, able to flow
solids with particles randomly distributed without any long range pattern (plastic, glass, or charcoal)
solids with particles arranged in patterns with long range repeating order (salt, diamonds, sugar)
particles packed tightly together in fixed positions; can vibrate but not move, fixed shape and volume, do not flow and are not compressible
substance that has and occupies volume and has mass; classified by it's state and composition
statement that summarizes all past observations and predicts future observations; describes what happens; can be tested by experiments
set of highly controlled procedures designed to test whether an idea about nature is valid; generates observations that either validate or invalidate hypothesis
tentative interpretation or explanation for observation; can be tested to be proven wrong
particles have a lot of room to move around each other; take on shape and volume of container; compressible
types of particles, arrangement of particles, attractions and attachments between particles
composition varies throughout (too much salt, some falls to the bottom, leaving uneven composition)
using units as a guide to solve problems (always include units in calculations)
fractional quantity with units converting from unit on bottom and converting to unit on top
a repeated error which affects every measurement to the same degrees - caused by a technique problem or instruments.
Law of multiple proportions
WHEN 2 ELEMENTS (A+B) FORM 2 DIFFERENT COMPOUNDS, MASSES OF B THAT COMBINE WITH 1g OF A CAN BE EXPRESSED AS A RATIO OF SMALL WHOLE NUMBERS.
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