Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 614 · 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) yeast (b) a mirror (c) a sunny window (d) a balloon
2. 2.⚖️ 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
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is kept the same. (a) True (b) False
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sheet of white paper (c) a sunny window (d) a battery cell
5. 5.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
6. 6.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
7. 7.⚖️ 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) True (b) False
8. 8.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) it turns brighter (d) the rainbow fades
9. 9.True or false: yeast is needed for the water rainbow. (a) False (b) True
10. 10.⚖️ 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) True (b) False
11. 11.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the water is coloured (c) the paper makes colours (d) water splits the light
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) turmeric powder (c) a sheet of white paper (d) a clear glass of water
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 change it (b) we keep it the same (c) we measure it
14. 14.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so it turns blue (d) so the Sun moves
15. 15.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
16. 16.🌈 How many colours do we name in a rainbow (VIBGYOR)?
17. 17.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
18. 18.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) turmeric powder (c) a mirror (d) yeast
19. 19.True or false: yeast is not needed for the water rainbow. (a) False (b) True
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) a sunny window (d) a magnet
22. 22.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
23. 23.🌈 In VIBGYOR, what number colour is green?
24. 24.🛟 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
25. 25.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
26. 26.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) bright sunlight (c) a sheet of white paper (d) a balloon
27. 27.🌈 In VIBGYOR, what number colour is blue?
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the amount of water (c) the same glass
29. 29.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is what we measure. (a) True (b) False
30. 30.🌈 In VIBGYOR, what number colour is violet?
31. 31.🌈 In VIBGYOR, what number colour is indigo?
32. 32.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
33. 33.🌈 In VIBGYOR, what number colour is red?
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
36. 36.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is what we measure. (a) False (b) True
37. 37.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a clear glass of water (c) yeast (d) bright sunlight
38. 38.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) a balloon (d) bright sunlight
39. 39.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
40. 40.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed

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