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PS 05b Changes in Ma
8th Grade 2022
| Question | Answer |
|---|---|
| Changes to matter that alter the appearance of a substance, but do not make something new. | Physical Changes |
| Changes to matter that produce a new substance through a chemical reaction. | Chemical Changes |
| Chemical reactions that take in heat energy. | Endothermic |
| States that matter cannot be created or destroyed. | Law of Conservation of Matter |
| Chemical reactions that release heat energy. | Exothermic |
| The left side of a chemical equation that shows the materials you start with in a reaction. | Reactants |
| Changes that alter the center of an atom. | Nuclear |
| The right side of a chemical equation that shows the materials you make or end up with in a reaction. | Products |
| Nuclear reaction that happens in stars, which combines smaller hydrogen atoms into bigger helium atoms and releases huge amounts of energy. | Fusion |
| Nuclear reaction that happens in nuclear power plants that splits larger uranium/plutonium atoms into smaller atoms and releases huge amounts of energy. | Fission |
| Give examples of chemical changes | Burning, rusting, digesting, reacting |
| Give examples of physical changes | Melting, boiling, freezing, evaporating, breaking, dissolving |
| Efficient energy, no pollution, alternative to fossil fuels. | Pros of Nuclear energy |
| Radioactive waste that must be safely stored for thousands of years. | Cons of Nuclear energy |
Created by:
Mr. Dornfeld
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