click below
click below
Normal Size Small Size show me how
Topic 2:
Intro to Matter
Term | Definition |
---|---|
Matter | anything that has mass and takes up space |
Substance | a single kind of matter that is pure and has a specific set of properties |
Physical Property | a characteristic of a pure substance that can be observed without changing it into another substance |
Chemical Property | a characteristic of a substance that describes its ability to change into different substance |
Atom | basic particle from which all elements are made; smallest particle of an element that has the properties of that element |
Element | a substance that contains one kind of atom and cannot be broken down into a simpler form |
Molecule | a neutral group of two or more atoms held together by covalent bonds |
Compound | a substance made of two or more elements chemically combined in a specific ratio or proportion |
Mixture | two or more substances that are together in the same place but their atoms are not chemically bonded |
Heterogeneous Mixture | mixed together, but not chemically bonded to each other; can easily see pieces like in salad or cereal |
Homogeneous Mixture | difficult or impossible to see the different parts like salt water or air |
Distillation | separating liquids by boiling them; lower boiling point will vaporize first, leaving the other liquid behind |
Mass | a measure of how much matter is in an object; SI unit g or kg |
Volume | the amount of space that matter occupies; SI unit cm or mL |
Weight | a measure of the force of gravity acting on an object; SI unit lbs (pounds) |
Density | the measurement of how much mass of a substance is contained in a given volume; SI unit g/cm2 or g/mL2 |
Physical Change | a change that alters the form or appearance of a material but does not make the material into another substance |
Chemical Change | a chemical in which one or more substances combine or break apart to form new substances |