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Earth's Structures
| Term | Definition |
|---|---|
| Mineral | a naturally formed, inorganic solid with a crystalline structure |
| Element | a substance that cannot be separated or broken down into simpler substance by chemical means; all atoms of an element have the same atomic number |
| Atom | The smallest unit of an element that maintains the properties of that element |
| Compound | a substance made up of atoms or ions of two or more different elements joined by chemical bonds |
| Matter | anything that has mass and takes up space |
| Crystal | Natural solid substance that has a definite geometric shape |
| Streak | the color of a mineral in powered form |
| Luster | The way in which a mineral reflects light |
| Cleavage | In geology, the tendency of a mineral to split along specific planes of weakness to form smooth, flat surfaces |