Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 435 · 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.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns brighter (c) it turns all red (d) it floats away
2. 2.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a magnet (d) a shadow of ice
3. 3.⚖️ 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 white paper (b) the same glass (c) the amount of water (d) brightness of rainbow
4. 4.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
5. 5.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the water is coloured (c) water splits the light (d) the glass is painted
6. 6.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
7. 7.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) 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 time of day”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.⚖️ 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 white paper (d) the same glass
10. 10.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a balloon (c) a mirror (d) a battery cell
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 keep it the same (b) we change it (c) we measure it
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.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a magnet (c) a clear glass of water (d) a mirror
14. 14.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) green (d) red
15. 15.⚖️ 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
16. 16.🌈 How many colours do we name in a rainbow (VIBGYOR)?
17. 17.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) a magnet
18. 18.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
19. 19.⚖️ 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
20. 20.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it through glass (c) look at it in a mirror (d) stare at the Sun
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) False (b) True
22. 22.True or false: a clear glass of water is needed for the water rainbow. (a) False (b) True
23. 23.⚖️ 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
24. 24.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it turns blue (c) so it gets hot (d) so it does not fall
25. 25.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) magnets (d) clouds
26. 26.🌈 In VIBGYOR, what number colour is blue?
27. 27.⚖️ 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) True (b) False
28. 28.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True
29. 29.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
30. 30.True or false: turmeric powder is not needed for the water rainbow. (a) True (b) False
31. 31.True or false: a mirror is not needed for the water rainbow. (a) False (b) True
32. 32.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
33. 33.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
34. 34.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
35. 35.🌈 In VIBGYOR, what number colour is orange?
36. 36.🌈 In VIBGYOR, what number colour is violet?
37. 37.🧺 Which of these is needed for the water rainbow? (a) a sunny window (b) turmeric powder (c) a magnet (d) a battery cell
38. 38.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
39. 39.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a clear glass of water (c) yeast (d) a sheet of white paper
40. 40.🧺 Which of these is not needed for the water rainbow? (a) turmeric powder (b) a clear glass of water (c) a sunny window (d) a sheet of white paper

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