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Science Questions

Clear answers to everyday science questions, from light and sound to chemistry, weather and the Earth itself.

  1. Why is the sea blue?Science
  2. What is inertia?Science
  3. What is a lunar eclipse?Science
  4. How do solar panels work?Science
  5. What is renewable energy?Science
  6. What is kinetic energy?Science
  7. What are Newton's three laws of motion?Science
  8. What is the difference between mass and weight?Science
  9. What is a compound?Science
  10. What is an element?Science
  11. Why is grass green?Science
  12. Why do stars twinkle?Science
  13. What causes the northern lights?Science
  14. What is a light-year?Science
  15. What is a black hole?Science
  16. What is the speed of sound?Science
  17. What is static electricity?Science
  18. How do magnets work?Science
  19. What is the largest organism on Earth?Science
  20. What causes earthquakes?Science
  21. How do volcanoes form?Science
  22. What causes tides?Science
  23. What causes the seasons?Science
  24. What is the difference between weather and climate?Science
  25. What is absolute zero?Science
  26. Why do objects fall at the same speed in a vacuum?Science
  27. What is gravity?Science
  28. What does E=mc2 mean?Science
  29. Who proposed the theory of relativity?Science
  30. Who discovered penicillin?Science
  31. What is DNA?Science
  32. What is photosynthesis?Science
  33. What is the most abundant element in the universe?Science
  34. What is the lightest element?Science
  35. How many elements are on the periodic table?Science
  36. What is the chemical formula for water?Science
  37. What is the chemical symbol for gold?Science
  38. What is the hardest natural substance?Science
  39. What is the freezing point of water?Science
  40. What is the boiling point of water?Science
  41. Why are sunsets red and orange?Science
  42. What is the most abundant gas in Earth's air?Science
  43. Why do leaves change color in autumn?Science
  44. Why is the ocean salty?Science
  45. What is the speed of light?Science
  46. Why do we see lightning before we hear thunder?Science
  47. What makes a rainbow?Science
  48. Why does ice float on water?Science