Chapter 2 Vocabulary _____________: The amount of matter a substance has; different from ‘weight’ which is dependent on gravity. Volume: __________________________________________ _______________________________. ___________________: Any substance that takes up space (volume) and has mass.

Physical Versus Chemical Properties _______________ Property: A quality or condition of a substance that can be measured without changing the substance’s composition (chemical structure). Color, state, melting point, freezing point are examples Physical ____________: During a physical change, some properties of the substance change, but the composition of the material does NOT change. Phase changes are an example Physical changes can be ______________________ (phase changes) or ___________________________ (broken glass).

Mixtures: ________________________ _________________________________ ___________________________ Mixture: When the composition of the mixture is EVEN throughout. Every sample of the mixture would contain the same ratio of substances. A ___________________________ is another name for a homogenous mixture. Brass is an example (even mixture of copper and nickel) ___________________________ Mixture: When the composition of the mixture is NOT uniform throughout. Chicken noodle soup is an example

Elements and Compounds _____________________: The simplest form of matter that has a unique set of properties. (Think Periodic Table!) ______________________: A substance that has two or more elements chemically combined in a fixed proportion. examples: H2O, CO2, NaCl, C6H12O6 Compounds CAN be broken down into elements by chemical means, but elements CANNOT. ________________________ Change: A change that produces matter with a different chemical composition than the original matter.

Possible clues to chemical change include (1) _____________________________________ (2) ___________________________________________ (3) ___________________________________________ (4) formation of a _______________________________ (solid coming out of solution)