Rainbow Science Experiment Worksheet

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

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