Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 700 · 40 questions

What you do (Bend and split): 1. Fill a clear glass with water and set it on a steady, sunny windowsill. 2. Put white paper on the floor where the sunlight passes through the glass. 3. Move the paper or glass slowly until a rainbow appears. 4. Never look straight at the Sun.

1. 1.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a mirror (c) turmeric powder (d) yeast
2. 2.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) a sheet of white paper (d) yeast
3. 3.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) bright sunlight (c) a sunny window (d) a balloon
4. 4.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a magnet (c) a small rainbow (d) a shadow of ice
5. 5.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a battery cell (c) a sheet of white paper (d) a sunny window
6. 6.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
8. 8.True or false: a magnet is needed for the water rainbow. (a) True (b) False
9. 9.🌈 In VIBGYOR, what number colour is red?
10. 10.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it through glass (c) look at it in a mirror (d) stare at the Sun
11. 11.True or false: yeast is needed for the water rainbow. (a) False (b) True
12. 12.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) False (b) True
14. 14.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
15. 15.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
16. 16.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
17. 17.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) magnets (c) balloons (d) prisms
18. 18.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it gets hot (c) so the Sun moves (d) so it does not fall
19. 19.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a sunny window (d) a magnet
20. 20.🌈 How many colours do we name in a rainbow (VIBGYOR)?
21. 21.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
22. 22.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it floats away (c) it turns all red (d) it turns brighter
23. 23.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the paper makes colours (c) the water is coloured (d) the glass is painted
24. 24.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) turmeric powder (c) bright sunlight (d) a sunny window
28. 28.🌦️ To see a rainbow in the sky, where must the Sun be? (a) behind you (b) in front of you (c) straight above you (d) under the ground
29. 29.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a magnet (c) a sheet of white paper (d) a clear glass of water
30. 30.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
31. 31.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the amount of water (b) the same window (c) brightness of rainbow (d) the same glass
32. 32.🌈 In VIBGYOR, what number colour is blue?
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) a sunny window (c) a clear glass of water (d) bright sunlight
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) brightness of rainbow (b) the amount of water (c) the same glass (d) the time of day
35. 35.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
36. 36.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
37. 37.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) yeast (c) a sunny window (d) a mirror
38. 38.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
39. 39.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
40. 40.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed

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