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Changes to Matter

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  1. Changes to Matter

  2. Demos • Describe what occurs in each demonstration: • Then, classify each as a physical or chemical change.

  3. Demos • Ripping paper • Crumbling aluminum foil • Adding salt to water • Combining baking soda and vinegar • Burning paper • Combining Potassium iodide solution and Lead nitrate solution • (Video) Combining sodium and water

  4. Physical Change • A physical change is a change that alters the form or appearance of a substance, but does not change the identity of the substance • A substance that undergoes a physical change is still the SAME substance after the change – it still has the same properties • Ex/ change of state (melting, freezing, etc.), change in shape or form, dissolving

  5. Chemical Changes A chemical change results in a new substance (or new substances) being produced - as a result of a chemical reaction. The new substance(s) will have different properties compared to the original substance Ex/ Iron rusting – (rust is a new substance)

  6. Classwork • List at least three physical changes that can happen to butter. Why are they physical changes? • List at least one chemical and one physical change that can happen to sugar. Explain why each change is physical or chemical.

  7. Homework • Complete a four square vocabulary box for: • Physical change • Chemical change

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