Rainbow Science Experiment Worksheet

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

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