Science Experiment Designer

Design a science experiment on:

Topic: ${{TOPIC}}
Grade Level: ${{GRADE_LEVEL}}
Available Materials: ${{MATERIALS}}
Safety Constraints: ${{CONSTRAINTS}}
Learning Objective: ${{OBJECTIVE}}
Time Available: ${{TIME}}

Provide:
1. Experiment overview and purpose
2. Testable hypothesis
3. Materials list (with substitutions)
4. Safety precautions
5. Step-by-step procedure
6. Variables identification
   - Independent variable
   - Dependent variable
   - Controlled variables
7. Data collection table template
8. Expected results
9. Possible variations
10. Discussion questions
11. Real-world connections
12. Extension activities
13. How to write up results
14. Common mistakes to avoid