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science final exam 2
Physical Science Final Exam Review Szerdy part 2
| Term | Definition |
|---|---|
| periodic table | a chart where elements are grouped according to similar properties. Elements in the same vertical column are VERY similar. |
| Solid | Particles are tightly packed, vibrate in place. Have constant shape & volume. |
| Liquid | Particles are more loosely packed. Have a constant volume, can change shape. |
| Gas | Particles are very spread out and move freely. Volume and shape can change. |
| Acid | pH of 0 - 6. Has a sour taste, reacts with metals and carbonates. (Example: citrus juice, soda, vinegar, stomach acid.) |
| Base | pH of 8-14. Has a bitter taste, feels slippery, Does not react with metal/carbonates. (Soap, ammonia, Shampoo, baking soda) |
| pH Scale | Used to measure acids and bases. |
| neutral | pH of 7, (Example: water) |
| salt | when an acid and base combine, neutralize each other, make crystals. |
| Pure substance | only one type of substance that can NOT be easily separated. |
| Mixture | Two or more substances that are in the same place, but atoms are NOT chemically bonded. |
| Heterogeneous mixture | can be easily separated (Example: trail mix, or a salad) |
| Homogeneous mixture | evenly mixed, can NOT be easily separated (Example: Smoothie) |
| Solution | When one part of the mixture is dissolved in another. (Example: Lemonade) |
| Solvent | The part of the mixture in the largest amount (Example: the water in the lemonade) |
| Solute | The part of the mixture in lesser amount )Example: Sugar or lemon in Lemonade) |
| Saturation | When a solution has dissolved as much of the solute as it can possibly hold. |
| magnet | Method of separation.....to pull iron filings out of sand. |
| Filter | Method of separation.....to separate sand from water. |
| Distillation | Method of separation.....where alcohol boils at a lower temperature, leaving water behind. |
| Evaporation | Method of Separation....to remove water and leave salt behind. |
Created by:
Hinson Science
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