Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 840 · 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.⚖️ 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
2. 2.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) reflection (c) magnetism (d) refraction
3. 3.🌈 In VIBGYOR, what number colour is green?
4. 4.🧺 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) bright sunlight
5. 5.⚖️ 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) False (b) True
6. 6.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (a) True (b) False
7. 7.🧺 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) yeast (d) a sunny window
8. 8.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
9. 9.⚖️ 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) False (b) True
10. 10.🌈 In VIBGYOR, what number colour is orange?
11. 11.⚖️ 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
12. 12.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a small rainbow (c) a magnet (d) a shadow of ice
13. 13.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) stare at the Sun (d) never look at the Sun
14. 14.⚖️ 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
15. 15.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns brighter (c) it turns all red (d) it floats away
16. 16.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
17. 17.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) orange (c) yellow (d) violet
18. 18.⚖️ 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
19. 19.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) magnets (c) prisms (d) balloons
20. 20.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) a magnet (d) bright sunlight
21. 21.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it gets hot (c) so it does not fall (d) so it turns blue
22. 22.🌈 How many colours do we name in a rainbow (VIBGYOR)?
23. 23.⚖️ 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) brightness of rainbow (b) the same white paper (c) the same glass (d) the amount of water
24. 24.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a magnet (c) a sheet of white paper (d) bright sunlight
25. 25.⚖️ 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
26. 26.True or false: a clear glass of water is needed for the water rainbow. (a) True (b) False
27. 27.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) a mirror (d) a sheet of white paper
28. 28.True or false: turmeric powder is needed for the water rainbow. (a) False (b) True
29. 29.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a clear glass of water (c) yeast (d) turmeric powder
31. 31.🌈 In VIBGYOR, what number colour is indigo?
32. 32.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) water splits the light (c) the water is coloured (d) the paper makes colours
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 change it (b) we keep it the same (c) we measure it
34. 34.⚖️ 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 measure it (b) we change it (c) we keep it the same
35. 35.⚖️ 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) brightness of rainbow (c) the time of day (d) the same white paper
36. 36.🧺 Which of these is not needed for the water rainbow? (a) a mirror (b) a clear glass of water (c) a sheet of white paper (d) bright sunlight
37. 37.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
38. 38.🌈 In VIBGYOR, what number colour is blue?
39. 39.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
40. 40.True or false: a magnet is needed for the water rainbow. (a) True (b) False

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