Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 300 · 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.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) never look at the Sun (c) look at it in a mirror (d) look at it through glass
2. 2.⚖️ 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
3. 3.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) yellow (c) violet (d) orange
4. 4.🌈 In VIBGYOR, what number colour is red?
5. 5.🌈 In VIBGYOR, what number colour is orange?
6. 6.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
7. 7.True or false: yeast is needed for the water rainbow. (a) False (b) True
8. 8.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) magnets (c) clouds (d) balloons
9. 9.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
10. 10.⚖️ 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
11. 11.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
12. 12.⚖️ 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) the time of day (c) brightness of rainbow
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sheet of white paper (c) a sunny window (d) a magnet
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 same glass (b) brightness of rainbow (c) the amount of water (d) the time of day
15. 15.🌈 How many colours do we name in a rainbow (VIBGYOR)?
16. 16.⚖️ 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
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) under the ground (c) behind you (d) in front of you
19. 19.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) turmeric powder (c) bright sunlight (d) a sunny window
21. 21.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sheet of white paper (c) yeast (d) a clear glass of water
22. 22.True or false: a clear glass of water is needed for the water rainbow. (a) True (b) False
23. 23.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) turmeric powder (c) a sheet of white paper (d) a sunny window
24. 24.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
25. 25.⚖️ 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) True (b) False
26. 26.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) False (b) True
27. 27.True or false: a magnet is needed for the water rainbow. (a) False (b) True
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 glass (b) brightness of rainbow (c) the amount of water
29. 29.🧺 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 mirror
30. 30.⚖️ 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 same white paper (d) the same glass
31. 31.⚖️ 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 change it (b) we measure it (c) we keep it the same
32. 32.⚖️ 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) False (b) True
33. 33.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) blue (c) red (d) violet
34. 34.🌈 In VIBGYOR, what number colour is indigo?
35. 35.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it floats away (c) it turns brighter (d) it turns all red
36. 36.🛟 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 the Sun moves (d) so it turns blue
37. 37.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
38. 38.🌈 In VIBGYOR, what number colour is blue?
39. 39.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sheet of white paper (c) a battery cell (d) a sunny window
40. 40.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed

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