Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 53 · 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.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
2. 2.🧺 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 balloon (d) a sunny window
3. 3.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) behind you (c) under the ground (d) straight above you
4. 4.🌈 How many colours do we name in a rainbow (VIBGYOR)?
5. 5.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
6. 6.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
7. 7.🛟 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
8. 8.⚖️ 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 keep it the same (c) we change it
9. 9.🛟 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
10. 10.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the paper makes colours (c) the water is coloured (d) the glass is painted
11. 11.🌈 In VIBGYOR, what number colour is red?
12. 12.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
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 keep it the same (b) we measure it (c) we change it
14. 14.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a balloon (c) a clear glass of water (d) a magnet
15. 15.True or false: a mirror is not needed for the water rainbow. (a) False (b) True
16. 16.🌈 In VIBGYOR, what number colour is yellow?
17. 17.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is what we measure. (a) True (b) False
18. 18.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
19. 19.🌈 In VIBGYOR, what number colour is orange?
20. 20.⚖️ 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 change it (c) we keep it the same
21. 21.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
22. 22.📘 What do we call light bending as it passes from air into water? (a) magnetism (b) reflection (c) evaporation (d) refraction
23. 23.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) red (c) green (d) blue
24. 24.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a sheet of white paper (d) a magnet
25. 25.🌈 In VIBGYOR, what number colour is indigo?
26. 26.⚖️ 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 same glass
27. 27.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
28. 28.🌈 In VIBGYOR, what number colour is violet?
29. 29.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) a mirror (d) a clear glass of water
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) True (b) False
31. 31.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) clouds (c) prisms (d) balloons
32. 32.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
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 white paper”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.⚖️ 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) brightness of rainbow (d) the time of day
35. 35.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) violet (c) red (d) orange
36. 36.🌈 In VIBGYOR, what number colour is blue?
37. 37.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
38. 38.⚖️ 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 glass (b) the time of day (c) the amount of water (d) brightness of rainbow
39. 39.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
40. 40.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) snow falling (c) a shadow of ice (d) a small rainbow

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