Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 679 · 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.⚖️ 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
3. 3.True or false: a balloon is not needed for the water rainbow. (a) True (b) False
4. 4.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
5. 5.☀️ What is white sunlight really made of? (a) only yellow light (b) many colours mixed (c) tiny drops of water (d) tiny bits of dust
6. 6.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a balloon (c) a clear glass of water (d) yeast
7. 7.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a balloon (c) bright sunlight (d) a sunny window
8. 8.⚖️ 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
9. 9.True or false: a balloon is needed for the water rainbow. (a) False (b) True
10. 10.True or false: a clear glass of water is needed for the water rainbow. (a) True (b) False
11. 11.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) clouds (c) magnets (d) prisms
12. 12.🛟 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
13. 13.⚖️ 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 time of day (c) the amount of water (d) brightness of rainbow
14. 14.🌈 In VIBGYOR, what number colour is indigo?
15. 15.⚖️ 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
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) yeast (d) bright sunlight
17. 17.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
18. 18.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) yellow (c) red (d) violet
19. 19.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns brighter (c) it floats away (d) it turns all red
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a balloon (c) a sheet of white paper (d) bright sunlight
22. 22.📘 What do we call light bending as it passes from air into water? (a) reflection (b) evaporation (c) refraction (d) magnetism
23. 23.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
24. 24.True or false: a mirror is needed for the water rainbow. (a) False (b) True
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) never look at the Sun (d) stare at the Sun
26. 26.🌈 In VIBGYOR, what number colour is orange?
27. 27.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (a) False (b) True
28. 28.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sheet of white paper (c) turmeric powder (d) a clear glass of water
29. 29.🌈 In VIBGYOR, what number colour is yellow?
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 kept the same. (a) True (b) False
31. 31.🌈 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
32. 32.⚖️ 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
33. 33.🌈 In VIBGYOR, what number colour is violet?
34. 34.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
35. 35.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a balloon (c) yeast (d) bright sunlight
36. 36.🌈 In VIBGYOR, what number colour is green?
37. 37.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.⚖️ 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 measure it (c) we change it
40. 40.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a magnet (c) snow falling (d) a small rainbow

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