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Science Chapter 1
Lesson 1.2 Classifying Matter
| Term | Definition |
|---|---|
| element | a substance that cannot be broken down into any other substances by chemical or physical means. |
| atom | the basic particle from which all elements are made; the smallest particle of an element that has the properties of that element. |
| chemical bond | the force of attraction that holds two atoms together. |
| molecule | a neutral group of two or more atoms held together by covalent bonds. |
| mixture | two or more substances that are together in the same place but their atoms are not chemically combined. |
| chemical formula | symbols that show the elements in a compound and the ratio of atoms. |
| compound | a substance made of two or more elements chemically combined in a specific ratio, or proportion. |
| heterogeneous mixtures | mixtures you can see usually see the different parts and they can easily be separated out. (ex...guacamale, salad) |
| homogeneous mixtures | substances are so evenly mixed that you can't see the different parts. (ex...soy sauce, honey, ) |
| filtration | solids can be separated from liquids by pouring the mixture through filter. |
| distillation | liquids can be separated from each other by heating them up to the temperature at which one of the liquids boils. Then gas cools, forming the separated liquid. |
| magnetic attraction | iron objects can be separated from a mixture using a magnet. |
| evaporation | when left in the open air, liquid solutions can change to gas, leaving solid components behind. |
Created by:
mrsheck607