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Rochas e Minerais e as reações químicas

**Hands-On Activity: Chemical Reactions with Rocks and Minerals**

**Materials:**
1. Collection of rocks and minerals (labeled if possible)
2. Vinegar
3. Lemon juice
4. Cups or containers
5. Daily log or notebook
6. Safety goggles (optional)

**Step-by-Step Guide:**

1. **Introduction (5 minutes):**
– Explain the concept of chemical reactions and how certain rocks and minerals may react with acids like vinegar or lemon juice.
– Emphasize the importance of safety and the optional use of safety goggles.

2. **Gathering Materials (5 minutes):**
– Distribute rocks and minerals to participants.
– Provide each participant with vinegar, lemon juice, cups or containers, and a daily log or notebook.

3. **Safety Briefing (5 minutes):**
– If using safety goggles, provide a brief demonstration on their proper use.
– Emphasize caution and responsible experimentation.

4. **Testing Methods (10 minutes):**
– Explain the three testing methods: soaking rocks in vinegar, dropping vinegar on rocks, and pouring vinegar into a cup with a rock.
– Discuss the expected changes and reactions.

5. **Experimentation (20 minutes):**
– Allow participants to choose one or more testing methods for each rock or mineral.
– Instruct them to carefully observe and document any changes or reactions.

6. **Daily Log (15 minutes):**
– For the soaking method, encourage participants to keep a daily log noting changes observed over several days.
– Emphasize the importance of consistent and detailed documentation.

7. **Observation and Discussion (10 minutes):**
– Facilitate a group discussion where participants share their observations and findings.
– Discuss patterns, variations, and potential reasons for the observed reactions.

8. **Conclusion (5 minutes):**
– Summarize the significance of chemical reactions in understanding the composition of rocks and minerals.
– Discuss how these experiments align with real-world geological processes.

**Learning Outcomes:**
1. **Practical Application of Chemistry:** Participants will apply basic chemical concepts to observe reactions with rocks and minerals.
2. **Observational and Documentation Skills:** Keeping a daily log reinforces the importance of careful observation and documentation in scientific experiments.
3. **Critical Thinking:** Participants will analyze and interpret observed changes, fostering critical thinking skills.
4. **Understanding Geological Processes:** The activity provides insights into how certain rocks and minerals interact with acids, mirroring geological processes.
5. **Safety Awareness:** If safety goggles are used, participants will gain awareness of safety measures in scientific experimentation.

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