Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 599 · 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.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the water is coloured (c) water splits the light (d) the glass is painted
2. 2.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) yeast
3. 3.⚖️ 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
4. 4.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
5. 5.🧺 Which of these is needed for the water rainbow? (a) a sunny window (b) a battery cell (c) a balloon (d) turmeric powder
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) clouds (d) magnets
8. 8.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (c) look at it in a mirror (d) never look at the Sun
9. 9.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
10. 10.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) only yellow light (c) many colours mixed (d) tiny drops of water
11. 11.⚖️ 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 keep it the same (c) we change it
12. 12.🌈 In VIBGYOR, what number colour is indigo?
13. 13.⚖️ 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) the same white paper (d) brightness of rainbow
14. 14.⚖️ 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
15. 15.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
16. 16.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) yeast (c) a sheet of white paper (d) bright sunlight
17. 17.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
18. 18.True or false: a magnet is needed for the water rainbow. (a) True (b) False
19. 19.⚖️ 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
20. 20.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) the rainbow fades (d) it floats away
21. 21.True or false: bright sunlight is needed for the water rainbow. (a) False (b) True
22. 22.⚖️ 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) True (b) False
23. 23.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it turns blue (c) so the Sun moves (d) so it gets hot
24. 24.🌈 In VIBGYOR, what number colour is green?
25. 25.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) turmeric powder (c) a sunny window (d) bright sunlight
26. 26.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a mirror (c) a balloon (d) a sheet of white paper
27. 27.⚖️ 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 white paper (c) the same window (d) the amount of water
28. 28.True or false: yeast is not needed for the water rainbow. (a) False (b) True
29. 29.🌦️ To see a rainbow in the sky, where must the Sun be? (a) under the ground (b) in front of you (c) straight above you (d) behind you
30. 30.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) a balloon (c) turmeric powder (d) yeast
31. 31.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
32. 32.🌈 In VIBGYOR, what number colour is violet?
33. 33.🧺 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 magnet (d) a sunny window
34. 34.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is the one thing we change. (a) True (b) False
36. 36.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
37. 37.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) violet (c) red (d) green
38. 38.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a sheet of white paper (d) a battery cell
39. 39.⚖️ 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
40. 40.⚖️ 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

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