Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 718 · 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.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) magnets (c) balloons (d) prisms
2. 2.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
3. 3.🌈 In VIBGYOR, what number colour is green?
4. 4.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a small rainbow (c) a shadow of ice (d) a magnet
5. 5.🧺 Do we need a sheet of white paper 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 amount of water”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🌈 In VIBGYOR, what number colour is yellow?
8. 8.🛟 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
9. 9.⚖️ 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
10. 10.🌈 How many colours do we name in a rainbow (VIBGYOR)?
11. 11.🌈 In VIBGYOR, what number colour is blue?
12. 12.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a sunny window (d) yeast
14. 14.⚖️ 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) the same window (c) brightness of rainbow (d) the same glass
15. 15.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a balloon (c) a magnet (d) a clear glass of water
16. 16.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
17. 17.🌈 In VIBGYOR, what number colour is indigo?
18. 18.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) turmeric powder (b) a sunny window (c) a sheet of white paper (d) a clear glass of water
19. 19.⚖️ 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
20. 20.🔮 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
21. 21.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
22. 22.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
23. 23.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a magnet (c) a battery cell (d) a mirror
24. 24.🧺 Which of these is not needed for the water rainbow? (a) a mirror (b) bright sunlight (c) a clear glass of water (d) a sheet of white paper
25. 25.True or false: a mirror is needed for the water rainbow. (a) True (b) False
26. 26.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
27. 27.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
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) the same white paper (b) the amount of water (c) brightness of rainbow
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a magnet (c) a clear glass of water (d) bright sunlight
32. 32.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
33. 33.📘 What do we call light bending as it passes from air into water? (a) refraction (b) magnetism (c) reflection (d) evaporation
34. 34.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) water splits the light (c) the glass is painted (d) the paper makes colours
35. 35.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) look at it through glass (d) never look at the Sun
36. 36.True or false: a sunny window is needed for the water rainbow. (a) True (b) False
37. 37.⚖️ 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
38. 38.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
39. 39.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
40. 40.⚖️ 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 amount of water (b) brightness of rainbow (c) the time of day

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