Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 769 · 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.True or false: a mirror is not needed for the water rainbow. (a) False (b) True
2. 2.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) the rainbow fades (c) it turns brighter (d) it turns all red
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is what we measure. (a) True (b) False
4. 4.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) yeast (c) a magnet (d) a battery cell
5. 5.🧺 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 sunny window
6. 6.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) never look at the Sun (c) look at it through glass (d) stare at the Sun
7. 7.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) turmeric powder (d) a sunny window
8. 8.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a balloon (d) a sheet of white paper
9. 9.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) red (c) green (d) violet
10. 10.⚖️ 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) the time of day (b) the same glass (c) brightness of rainbow (d) the amount of water
11. 11.🌈 How many colours do we name in a rainbow (VIBGYOR)?
12. 12.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) under the ground (c) straight above you (d) behind you
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.🌈 In VIBGYOR, what number colour is indigo?
15. 15.True or false: yeast is needed for the water rainbow. (a) False (b) True
16. 16.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
17. 17.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
18. 18.True or false: a mirror is needed for the water rainbow. (a) False (b) True
19. 19.🌈 In VIBGYOR, what number colour is blue?
20. 20.True or false: a sheet of white paper is needed for the water rainbow. (a) True (b) False
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) True (b) False
22. 22.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) prisms (c) magnets (d) balloons
23. 23.🌈 In VIBGYOR, what number colour is green?
24. 24.🛟 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
25. 25.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
26. 26.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
27. 27.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
28. 28.🌈 In VIBGYOR, what number colour is orange?
29. 29.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a clear glass of water (c) bright sunlight (d) a magnet
30. 30.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
31. 31.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
32. 32.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.True or false: a magnet is needed for the water rainbow. (a) True (b) False
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) True (b) False
36. 36.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a clear glass of water (c) a sheet of white paper (d) bright sunlight
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the paper makes colours (c) the glass is painted (d) water splits the light
39. 39.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a balloon (c) bright sunlight (d) a clear glass of water
40. 40.True or false: a balloon is not needed for the water rainbow. (a) False (b) True

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