Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 701 · 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.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) violet (c) red (d) blue
2. 2.🛟 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
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) True (b) False
4. 4.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a sunny window (c) turmeric powder (d) bright sunlight
5. 5.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it in a mirror (d) look at it through glass
6. 6.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) prisms (c) magnets (d) balloons
7. 7.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
8. 8.⚖️ 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 white paper (b) the same window (c) the amount of water (d) brightness of rainbow
9. 9.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) a battery cell (c) a mirror (d) yeast
10. 10.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a clear glass of water (c) a sheet of white paper (d) a battery cell
11. 11.🧺 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) turmeric powder (d) bright sunlight
12. 12.🧺 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
13. 13.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
14. 14.⚖️ 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
15. 15.📘 What do we call light bending as it passes from air into water? (a) refraction (b) reflection (c) magnetism (d) evaporation
16. 16.🌈 In VIBGYOR, what number colour is yellow?
17. 17.True or false: a balloon is needed for the water rainbow. (a) False (b) True
18. 18.🌈 In VIBGYOR, what number colour is green?
19. 19.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a magnet (d) a sheet of white paper
20. 20.🌈 In VIBGYOR, what number colour is red?
21. 21.🌈 How many colours do we name in a rainbow (VIBGYOR)?
22. 22.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the glass is painted (c) the water is coloured (d) the paper makes colours
23. 23.⚖️ 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
24. 24.⚖️ 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 change it (b) we measure it (c) we keep it the same
25. 25.⚖️ 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
26. 26.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
27. 27.🌈 In VIBGYOR, what number colour is orange?
28. 28.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
29. 29.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) yellow (c) violet (d) red
30. 30.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
31. 31.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
32. 32.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) it turns all red (d) the rainbow fades
33. 33.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
34. 34.⚖️ 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 window (b) the amount of water (c) brightness of rainbow (d) the time of day
35. 35.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
36. 36.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) yeast (c) a clear glass of water (d) a sunny window
37. 37.⚖️ 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 amount of water (c) the same white paper
38. 38.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a battery cell (c) yeast (d) a sunny window
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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