Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 14 · 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.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
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.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
5. 5.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) a shadow of ice (d) snow falling
6. 6.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
7. 7.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) stare at the Sun (c) look at it through glass (d) never look at the Sun
8. 8.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) bright sunlight (c) yeast (d) a sheet of white paper
9. 9.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) bright sunlight (d) turmeric powder
10. 10.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) clouds (c) balloons (d) magnets
11. 11.🌈 How many colours do we name in a rainbow (VIBGYOR)?
12. 12.⚖️ 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) brightness of rainbow (c) the same white paper (d) the time of day
13. 13.🧺 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) a sunny window (d) a balloon
14. 14.⚖️ 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 amount of water (c) brightness of rainbow (d) the same glass
15. 15.🌈 In VIBGYOR, what number colour is violet?
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 change it (b) we keep it the same (c) we measure it
17. 17.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the water is coloured (c) the glass is painted (d) water splits the light
18. 18.🌈 In VIBGYOR, what number colour is yellow?
19. 19.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) red (c) green (d) blue
20. 20.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a magnet (c) a sunny window (d) bright sunlight
21. 21.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
22. 22.True or false: yeast is needed for the water rainbow. (a) True (b) False
23. 23.🌈 In VIBGYOR, what number colour is green?
24. 24.🧺 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) a sheet of white paper
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) True (b) False
26. 26.🔮 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
27. 27.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
28. 28.🌈 In VIBGYOR, what number colour is blue?
29. 29.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) a sunny window (c) a clear glass of water (d) bright sunlight
30. 30.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
31. 31.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a clear glass of water (c) a balloon (d) bright sunlight
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a mirror (c) a sunny window (d) bright sunlight
35. 35.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
36. 36.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) turmeric powder (c) a sheet of white paper (d) a balloon
37. 37.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a magnet (c) a sunny window (d) a battery cell
38. 38.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
39. 39.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
40. 40.⚖️ 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 change it (c) we measure it

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