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Unit 2 lesson 17 matter interactions sample work

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Sure! Here’s a general outline of a sample work for a lesson on matter interactions, such as physical and chemical changes. This sample work can help illustrate important concepts related to matter and its interactions.

Unit 2 Lesson 17: Matter Interactions - Sample Work

Objective:

Understand the differences between physical and chemical changes in matter, and identify examples of each.

Key Concepts:

  1. Matter: Anything that has mass and occupies space.
  2. Physical Change: A change that affects one or more physical properties of a substance without altering its chemical composition.
    • Examples: melting, freezing, boiling, dissolving, breaking, etc.
  3. Chemical Change: A change that occurs when a substance transforms into one or more different substances, altering its chemical composition.
    • Examples: rusting, burning, fermenting, reacting, etc.

Activity 1: Identifying Changes

Instructions: Look at the following actions and determine whether they are examples of physical or chemical changes. Provide a brief explanation for your choice.

| Action | Physical Change? | Chemical Change? | Explanation | |-----------------------------|-------------------|-------------------|------------------------------------------------| | Ice melting into water | Yes | No | The substance (H2O) remains the same; only its state changes. | | Burning wood | No | Yes | The wood transforms into ash, smoke, and gases; new substances are formed. | | Sugar dissolving in water | Yes | No | The sugar can be recovered by evaporating the water; its chemical identity remains unchanged. | | Cooking an egg | No | Yes | The proteins in the egg undergo a chemical reaction, changing its structure and properties. |

Activity 2: Experiment - Observing Changes

Instructions: Conduct a simple experiment to observe a physical and a chemical change. Write down your observations and conclusions.

  1. Physical Change Experiment: Dissolve salt in water.

    • Materials Needed: Salt, water, a glass, a spoon.
    • Procedure: Add a tablespoon of salt to a glass of water and stir.
    • Observations: The salt disappears in the water, but it can be recovered by evaporating the water.
    • Conclusion: This is a physical change because the salt retains its chemical properties.

  2. Chemical Change Experiment: Baking soda and vinegar reaction.

    • Materials Needed: Baking soda, vinegar, a container.
    • Procedure: Mix baking soda with vinegar in a container.
    • Observations: Bubbles and fizzing occur, and the mixture rapidly forms gas.
    • Conclusion: This is a chemical change as new substances (carbon dioxide and water) are produced.

Reflection Questions:

  1. What is the key difference between physical and chemical changes?
  2. Can physical changes be reversed? Give an example.
  3. What indicators suggest that a chemical change has occurred?

Summary:

In this lesson, we explored the definitions and differences between physical and chemical changes. We conducted simple experiments to observe these changes in real-time and emphasized how to distinguish between the two.

Further Reading:

  • Textbook Chapter on Matter Interactions
  • Online resources on physical and chemical changes

Feel free to customize this sample work as needed for your lesson!