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JLC Sci Ch 13 6th Gr
JLC Sci Ch13 6th Grade Matter & How It Changes
| Question | Answer |
|---|---|
| Physical property | A property that involves a substance by itself |
| Mass | The amount of matter something has |
| Volume | The amount of space something takes up |
| Density | Amount of mass something has in relationship to its matter |
| Formula for Density | Density = mass / volume |
| Mixture | A combination of two or more substances that keep their original properties |
| Physical changes | A change that does not alter the properties of a substance |
| Solution | A mixture in which all the substances are evenly distributed |
| Suspension | A uniform mixture that contains particles that can be seen. Particles settle to bottom. Ex: soil in water |
| Colloid | A mixture that contains particles that are too small to see. Particles so small never settle to bottom. Ex milk |
| Chemical change | A change in which one or more new substances are formed. |
| Chemical property | A property that involves the ability of a substance to react with other materials |
| Reactivity | The ability of a substance to go through chemical change. |
| Stability | The ability of a substance to resist going through change. |
| Acid | A substance that turns blue litmus paper red |
| Base | A substance that turns red litmus paper blue |
| Indicator | Indicate whether a substance is acid or base Ex: litmus paper |
| pH scale | The measure of the strength or weakness of acids and bases. 0-14 |
| Neutral | Neither acid or base pH=7 |
| Acid | pH = 0-7 lower the number the stronger it is |
| Base | pH = 7-14 the higher it is the stronger it is |
| Synthesis reaction | Two or more substances that are put together to form a single substance. Ex: Carbon + Oxygen = Carbon Dioxide |
| Decomposition reaction | A single substance breaks up, forming two or more different substances. Ex: electricity through water = hydrogen + oxygen |
| Single replacement reaction | One substance replaces another. Ex: magnesium + lead nitrate = lead + magnesium nitrate |
| Double replacement reaction | Two substances switch places Ex: sodium chloride + silver nitrate = sodium nitrate + silver chloride |
Created by:
jkm1123
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