Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 910 · 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? True or false: the time of day is kept the same. (a) True (b) False
2. 2.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) False (b) True
3. 3.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a sunny window (c) a magnet (d) a clear glass of water
5. 5.⚖️ 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) the same white paper (d) brightness of rainbow
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 change it (b) we measure it (c) we keep it the same
7. 7.⚖️ 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 white paper (b) the amount of water (c) the same window (d) brightness of rainbow
8. 8.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
9. 9.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
10. 10.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
11. 11.True or false: a clear glass of water is needed for the water rainbow. (a) True (b) False
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) a clear glass of water (c) a sheet of white paper (d) bright sunlight
13. 13.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
14. 14.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) turmeric powder (c) a balloon (d) a magnet
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) True (b) False
17. 17.🌈 In VIBGYOR, what number colour is blue?
18. 18.🌈 In VIBGYOR, what number colour is indigo?
19. 19.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a mirror (c) a clear glass of water (d) yeast
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.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) yellow (c) orange (d) violet
22. 22.⚖️ 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
23. 23.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) never look at the Sun (d) stare at the Sun
24. 24.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a clear glass of water (c) a sunny window (d) a battery cell
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) turmeric powder (b) a sheet of white paper (c) bright sunlight (d) a sunny window
27. 27.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it gets hot (c) so the Sun moves (d) so it does not fall
28. 28.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) a clear glass of water (d) a balloon
29. 29.🌈 In VIBGYOR, what number colour is violet?
30. 30.⚖️ 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) True (b) False
31. 31.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) prisms (c) magnets (d) balloons
32. 32.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the paper makes colours (c) the glass is painted (d) water splits the light
33. 33.🌈 How many colours do we name in a rainbow (VIBGYOR)?
34. 34.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) red (c) green (d) blue
35. 35.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
36. 36.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
37. 37.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
38. 38.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
39. 39.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
40. 40.⚖️ 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

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