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| Questão | Responda |
| Are chemical bonds formed during physical or chemical changes (pick which one) | Chemical Changes |
| Give three examples of physical changes | Crushing, chewing, melting, freezing, crushing, mixing, moulding |
| What is a physical change? | Any change that has to do with size, form, appearance, texture, color, shape |
| What is a chemical change? | A change where chemical bonds are formed between the materials |
| List three signs of a chemical change | 1. A new product is formed 2. A chemical reaction occurs 3. The change is hard to reverse 4. Energy is released |
| Is energy released during physical changes? | No |
| Give three examples of a chemical change | Photosynthesis, rusting, burning, baking, cooking, exploding, decomposing |
| Which change is easy to reverse? (A chemical or physical change) | A physical change |
| Name the five properties of a physical change | 1. No new material is formed 2. No energy is released 3. No chemical bonds are formed 4. Any change that involves color, texture, size, shape, appearance or form 5. Easy to reverse |
| Name the five properties of a chemical change | 1. New materials are formed 2. Energy is released 3. Changes are hard to reverse 4. Any change that involves a chemical reaction 5. Chemical Bonds are formed |
| When do chemical changes occur? | When the atoms and molecules of substances react with one another |
| With what forces can you cause a physical change (three) | Temperature, force and motion |
| Which changes happen on a much smaller scale (chemical or physical changes)? | Chemical Changes |
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