Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 956 · 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 should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so it turns blue (d) so the Sun moves
2. 2.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) look at it through glass (d) never look at the Sun
3. 3.⚖️ 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 time of day
4. 4.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) balloons (c) clouds (d) magnets
5. 5.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) a battery cell (c) a magnet (d) yeast
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
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 measure it (b) we keep it the same (c) we change it
9. 9.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
10. 10.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
11. 11.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns brighter (c) it floats away (d) it turns all red
12. 12.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) water splits the light (d) the paper makes colours
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) bright sunlight (c) turmeric powder (d) a clear glass of water
14. 14.⚖️ 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
15. 15.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
16. 16.⚖️ 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 measure it (c) we change it
17. 17.⚖️ 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) False (b) True
18. 18.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a clear glass of water (c) a magnet (d) a sunny window
19. 19.🧺 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) yeast
20. 20.🌈 In VIBGYOR, what number colour is violet?
21. 21.📘 What do we call light bending as it passes from air into water? (a) refraction (b) reflection (c) magnetism (d) evaporation
22. 22.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
23. 23.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
24. 24.🌈 How many colours do we name in a rainbow (VIBGYOR)?
25. 25.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) orange (c) yellow (d) violet
26. 26.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
27. 27.True or false: a balloon is needed for the water rainbow. (a) True (b) False
28. 28.⚖️ 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 keep it the same (b) we change it (c) we measure it
29. 29.⚖️ 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 window
30. 30.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a sheet of white paper (c) a balloon (d) a battery cell
32. 32.⚖️ 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 measure it (c) we change it
33. 33.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) bright sunlight (d) a battery cell
34. 34.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
35. 35.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
36. 36.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a clear glass of water (c) turmeric powder (d) yeast
37. 37.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
38. 38.⚖️ 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) brightness of rainbow (b) the same glass (c) the same window (d) the amount of water
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) brightness of rainbow (b) the same window (c) the same white paper (d) the time of day
40. 40.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed

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