Rainbow Science Experiment Worksheet

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

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