7th grade physics exercises full of formulas, theories, the law, the subject
CHAPTER I. OPTICS
Lesson 1. Light Recognition - Light and Light
Problem 2. Light transmission
Problem 3. Apply the law of linear transmission of light
Problem 4. The law reflects light
Problem 5. An image of an object created by a flat mirror
Lesson 6. Practice: Observe and draw a picture of an object created by a flat mirror
Problem 7. Convex mirror
Problem 8. Recessed mirror
Problem 9. Summary of Chapter 1: Optics
CHAPTER II. LESSONS
Problem 10. Sound Source
Problem 11. Elevation of sound
Lesson 12. Soundness of sound
Lesson 13. Sound transmission environment
Problem 14. Negative Reflection - Echo
Problem 15. Noise pollution
Lesson 16: Summary of Chapter 2: Acoustics
Chapter III. ELECTRICITY
Lesson 17. Electrified by rubbing
Exercise 18. Two types of electricity
Exercise 19. Electricity - Power
Problem 20. Conductors and insulators in the metal
Lesson 21. Circuit Diagram - Current Dimensions
Problem 22. The effects of heat and light effects on electricity
Problem 23. Magnetic effects, chemical effects and physiological effects of electricity
Exercise 24. Current intensity
Problem 25. Voltage
Problem 26. Voltage between two ends of the power tool
Problem 27. Practice: Measure the current and voltage for a serial circuit
Problem 28. Practice: Measure voltage and current intensity for parallel circuit
Problem 29. Safety when using electricity
Lesson 30. Summary of Chapter 3: Electricity