Rainbow Science Experiment Worksheet

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

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