Question | Answer |
anything that takes up space and has mass | Matter |
Solid, Liquid, Gas, Volume, Mass | Properties of Matter |
Properties of substance that never change and are used to identify unknown matter | Characteristic Properties |
Changes the form of the substance, but does not alter its identity
Example: tear a sheet of paper, crush a can, boiling away water into water vapor, water freezes into ice | Physical Changes |
When a substance undergoes a chemical change into a different substance, with different properties
Examples: burn wood, carmelized sugar, water into hydrogen/oxygen | Chemical Changes |
The principle that the total amount of matter, can not be created nor destroyed during any chemical or physical change | Law of Conservation of Mass |
Consisting of two or more substances, that are not chemically combined
Example: soft drinks, gas and water, oil and water, salt and water, powdered drinks | Mixture |
The best mixed possible substances (saltwater, sugar and water) | Solution |
Substances made of one kind of matter and has definite set of properties
Example: sugar, salt, iron, aluminum, copper, oxygen | Pure Substance |
Pure substances that cannot be broken down into other substances Example: Peridodic Table of Elements, A little over 100 (116 elements), we use 30-40 in everyday life | Element |
Substances that are made of 2 or more elements chemically combined Example: Water (H2O), Salt (NaC1), Carbon Dioxide (CO2), Sugar (C12H22O11) | Compound |
The smallest particle of an element. (The thickness of a sheet of aluminum foil is made of 200,000 atoms | Atom |
A group of atoms joined together and act as one unit Example: O2H2O3 | Molecule |
A mixture of two or more substances that can be easily separated by common physical means Example: Oil and Water A mixture where the substances aren't easily distributed A mixture in which the ingredients are not uniformally dispersed | Heterogeneous Mixture |
A mixture that cannot be easily separated by common physical means Example: Saltwater A mixture that looks really "smooth" because everything is mixed together really well | Homogeneous Mixture |