Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 5 · 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.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a mirror (c) a balloon (d) bright sunlight
2. 2.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) the paper makes colours (d) water splits the light
3. 3.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
4. 4.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
5. 5.🧺 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) yeast
6. 6.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) True (b) False
8. 8.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a magnet (b) bright sunlight (c) a clear glass of water (d) a sheet of white paper
10. 10.⚖️ 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 white paper
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? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🌈 In VIBGYOR, what number colour is green?
14. 14.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
15. 15.⚖️ 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) the same window (d) the same glass
16. 16.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) a battery cell (d) a sunny window
17. 17.🔮 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
18. 18.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) prisms (d) clouds
19. 19.🌈 In VIBGYOR, what number colour is blue?
20. 20.⚖️ 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
21. 21.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
22. 22.⚖️ 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
23. 23.🧺 Which of these is not needed for the water rainbow? (a) a mirror (b) a sunny window (c) bright sunlight (d) a clear glass of water
24. 24.⚖️ 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
25. 25.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
26. 26.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) bright sunlight (c) a battery cell (d) a clear glass of water
28. 28.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a sheet of white paper (d) a mirror
29. 29.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
30. 30.⚖️ 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
31. 31.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a shadow of ice (c) a magnet (d) snow falling
32. 32.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so it does not fall (d) so the Sun moves
33. 33.📘 What do we call light bending as it passes from air into water? (a) refraction (b) evaporation (c) magnetism (d) reflection
34. 34.🌈 In VIBGYOR, what number colour is violet?
35. 35.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
36. 36.True or false: a balloon is not needed for the water rainbow. (a) True (b) False
37. 37.🌈 In VIBGYOR, what number colour is indigo?
38. 38.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
39. 39.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
40. 40.🌈 In VIBGYOR, what number colour is yellow?

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