Questions:, 1. How did people clean themselves before the invention of soap? , 2. Where was the first soap-like material though to have been made? , 3. Define the term “oil”? , 4. What is one similarity between fats and oils? 5. What is one difference between fats and oils? 6. What is meant by “room temperature”? , 7. How is soap made? , 8. What substances are added to soap, and what purpose do they serve? , 9. How does soap works? , 10. What is meant by “hard” water?, nonsense – REPORT, BRAINLIEST IF THE ANSWER IS CORRECT