Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 861 · 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.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) clouds (c) balloons (d) prisms
3. 3.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) the rainbow fades (c) it turns brighter (d) it floats away
4. 4.⚖️ 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 keep it the same (c) we measure it
5. 5.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a magnet (c) a battery cell (d) a sheet of white paper
6. 6.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it gets hot (c) so it turns blue (d) so it does not fall
7. 7.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) red (c) orange (d) violet
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 window (b) the amount of water (c) the same glass (d) the same white paper
9. 9.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) only yellow light (c) tiny drops of water (d) many colours mixed
10. 10.True or false: yeast is not needed for the water rainbow. (a) False (b) True
11. 11.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
12. 12.⚖️ 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
13. 13.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) red (d) green
14. 14.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) yeast (c) a sheet of white paper (d) bright sunlight
15. 15.🌈 In VIBGYOR, what number colour is indigo?
16. 16.📘 What do we call light bending as it passes from air into water? (a) magnetism (b) reflection (c) evaporation (d) refraction
17. 17.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a battery cell (c) a clear glass of water (d) a magnet
18. 18.⚖️ 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) the same glass (c) brightness of rainbow
19. 19.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a battery cell (c) a clear glass of water (d) a sunny window
20. 20.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a small rainbow (c) a shadow of ice (d) a magnet
21. 21.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
22. 22.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
23. 23.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a clear glass of water (c) a sheet of white paper (d) turmeric powder
24. 24.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a balloon (c) a magnet (d) bright sunlight
25. 25.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a magnet (c) a balloon (d) a sunny window
26. 26.⚖️ 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 measure it (c) we keep it the same
27. 27.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) True (b) False
28. 28.⚖️ 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) False (b) True
29. 29.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the paper makes colours (c) the water is coloured (d) water splits the light
30. 30.🌈 In VIBGYOR, what number colour is violet?
31. 31.⚖️ 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 same window (c) the time of day (d) brightness of rainbow
32. 32.🌦️ To see a rainbow in the sky, where must the Sun be? (a) behind you (b) under the ground (c) straight above you (d) in front of you
33. 33.True or false: a sunny window is not needed for the water rainbow. (a) False (b) True
34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
35. 35.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
36. 36.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
37. 37.🧺 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 sheet of white paper (d) a magnet
38. 38.🌈 In VIBGYOR, what number colour is green?
39. 39.🧺 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) a battery cell
40. 40.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed

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