Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 129 · 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.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) under the ground (c) in front of you (d) behind you
2. 2.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a clear glass of water (c) a balloon (d) a sheet of white paper
4. 4.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
5. 5.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
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 glass”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a mirror
8. 8.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a clear glass of water (c) bright sunlight (d) a battery cell
9. 9.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) balloons (c) clouds (d) magnets
10. 10.⚖️ 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 same window (c) the time of day (d) the amount of water
11. 11.🌈 How many colours do we name in a rainbow (VIBGYOR)?
12. 12.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) reflection (c) refraction (d) magnetism
13. 13.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) never look at the Sun (d) look at it in a mirror
14. 14.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
15. 15.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
16. 16.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
17. 17.🌈 In VIBGYOR, what number colour is orange?
18. 18.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) bright sunlight (c) a clear glass of water (d) a sunny window
19. 19.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) red (c) violet (d) 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 same white paper”? (a) we measure it (b) we change 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 clear glass of water (b) turmeric powder (c) bright sunlight (d) a sheet of white paper
22. 22.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
23. 23.🧺 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
24. 24.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) yeast (c) a mirror (d) a sheet of white paper
25. 25.⚖️ 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 window (b) the amount of water (c) brightness of rainbow
26. 26.⚖️ 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 same glass (b) the amount of water (c) brightness of rainbow (d) the same window
27. 27.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it gets hot (d) so it does not fall
28. 28.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) turmeric powder (c) a mirror (d) a sunny window
29. 29.True or false: yeast is needed for the water rainbow. (a) True (b) False
30. 30.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a shadow of ice (c) a magnet (d) snow falling
31. 31.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
32. 32.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
33. 33.True or false: turmeric powder is not needed for the water rainbow. (a) True (b) False
34. 34.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it in a mirror (d) look at it through glass
35. 35.True or false: a magnet is needed for the water rainbow. (a) False (b) True
36. 36.🌈 In VIBGYOR, what number colour is yellow?
37. 37.⚖️ 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 change it (c) we measure it
38. 38.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a mirror (c) turmeric powder (d) a clear glass of water
39. 39.⚖️ 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 same glass (c) the amount of water
40. 40.🧺 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

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