Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 742 · 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.🔮 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
2. 2.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) never look at the Sun (c) look at it through glass (d) look at it in a mirror
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a balloon (c) a sunny window (d) bright sunlight
5. 5.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
6. 6.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
7. 7.⚖️ 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 keep it the same (b) we change it (c) we measure it
8. 8.🌈 In VIBGYOR, what number colour is blue?
9. 9.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
10. 10.🌈 In VIBGYOR, what number colour is indigo?
11. 11.True or false: a balloon is needed for the water rainbow. (a) True (b) False
12. 12.True or false: yeast 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 “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
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.🌈 How many colours do we name in a rainbow (VIBGYOR)?
16. 16.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
17. 17.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
18. 18.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a clear glass of water (c) yeast (d) bright sunlight
19. 19.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) water splits the light (c) the water is coloured (d) the glass is painted
20. 20.True or false: yeast is needed for the water rainbow. (a) True (b) False
21. 21.⚖️ 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
22. 22.⚖️ 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 amount of water (d) the same window
23. 23.🌈 In VIBGYOR, what number colour is violet?
24. 24.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
25. 25.🛟 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 does not fall (d) so it gets hot
26. 26.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) prisms (c) balloons (d) magnets
27. 27.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) a magnet (d) bright sunlight
28. 28.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
29. 29.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) many colours mixed (c) tiny drops of water (d) only yellow light
30. 30.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) yeast (c) a balloon (d) a sheet of white paper
31. 31.True or false: a magnet is needed for the water rainbow. (a) False (b) True
32. 32.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) turmeric powder (c) a sheet of white paper (d) a sunny window
33. 33.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) bright sunlight (c) a magnet (d) a clear glass of water
34. 34.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) a magnet (c) a balloon (d) a battery cell
35. 35.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) under the ground (c) straight above you (d) behind you
36. 36.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a mirror (c) a sunny window (d) yeast
37. 37.🌈 In VIBGYOR, what number colour is yellow?
38. 38.📘 What do we call light bending as it passes from air into water? (a) refraction (b) magnetism (c) reflection (d) evaporation
39. 39.⚖️ 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
40. 40.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) False (b) True

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