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Science Quarterly
| Question | Answer |
|---|---|
| Endothermic | a phase change or reaction where heat is absorbed |
| exothermic | a phase change or reaction where heat is released |
| Is this exothermic or endothermic? Melting | Endothermic |
| Is this exothermic or endothermic? Freezing | Exothermic |
| Is this exothermic or endothermic? Condensation | Exothermic |
| Is this exothermic or endothermic? Evaporation | Endothermic |
| Physical or chemical change: A pencil breaking in half | Physical |
| Physical or chemical change: Iron turning into rust | Chemical |
| Physical or chemical change: Mixing baking soda and vinegar to cause the bubbling and fizzing | Chemical |
| Physical or chemical change: Folding clothes after they come out of the dryer | Physical |
| Physical or chemical change: When wood burns and you smell it | Chemical |
| Physical or chemical change: Clipping your fingernails | Physical |
| Physical or chemical change: freezing water | physical |
| Physical or chemical change: Changing the shape of a piece of play-doh | physical |
| Physical or chemical change: acid cooking a raw egg | chemical |
| Physical or chemical change: When the food that you eat digests | chemical |
| is usually reversible change in the physical properties of matter such a size or shape but does not change the matter itself. | physical change: |
| It is an irreversible change in one or more substances into entirely new substances with different properties, | chemical change |
| phase changes are physical changes vaporizing | liquid to gas |
| phase changes are physical changes melting | solid to liquid |
| phase changes are physical changes subliming | solid to gas |
| phase changes are physical changes: freezing | liquid to solid |
| phase changes are physical changes condensing | gas to liquid |
| phase changes are physical changes deposition | gas to solid |