Did You Know? 1. What is the chemical symbol for gold? A. Au 2. What is the fundamental unit of power in the International System of Units? A. Watt 3. Which element is common in sand, rocks, and the earth's crust? A. Oxygen 4. What is the process where a liquid turns into a gas at a temperature below its boiling point? A. Evaporation 5. Who is credited with the discovery of the laws of motion? A. Sir Isaac Newton 6. What is the SI unit for measuring the flow of electric charge? A. Ampere 7. What is the study of the properties and interactions of matter and energy? A. Physics 8. Which force keeps planets in orbit around the sun? A. Gravitational force 9. What is the force that opposes the motion of objects through a fluid? A. Drag force 10. What is the unit of measurement for energy? A. Joule Test your knowledge of physical sciences with these trivia questions and learn more about the fascinating world of matter, energy, and forces.