Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 323 · 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.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
2. 2.🌈 How many colours do we name in a rainbow (VIBGYOR)?
3. 3.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
4. 4.🧺 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) bright sunlight (d) yeast
5. 5.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) never look at the Sun (d) stare at the Sun
6. 6.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) green (c) red (d) violet
7. 7.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it gets hot (d) so it does not fall
8. 8.⚖️ 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 change it (b) we keep it the same (c) we measure it
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
11. 11.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
12. 12.🌈 In VIBGYOR, what number colour is indigo?
13. 13.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) the rainbow fades (c) it floats away (d) it turns all red
14. 14.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) a mirror (c) a magnet (d) a balloon
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a balloon (d) a sheet of white paper
16. 16.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) clouds (c) magnets (d) prisms
17. 17.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
18. 18.🌈 In VIBGYOR, what number colour is blue?
19. 19.🌈 In VIBGYOR, what number colour is violet?
20. 20.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
21. 21.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
22. 22.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
23. 23.⚖️ 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 time of day (b) the same glass (c) the same window (d) the amount of water
24. 24.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) violet (c) red (d) yellow
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 measure it (c) we keep it the same
26. 26.⚖️ 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 measure it (c) we keep it the same
27. 27.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) yeast (c) a balloon (d) a clear glass of water
28. 28.⚖️ 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) brightness of rainbow (c) the amount of water (d) the time of day
29. 29.⚖️ 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 window (c) brightness of rainbow
30. 30.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the paper makes colours (c) water splits the light (d) the water is coloured
31. 31.⚖️ 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
32. 32.🌈 In VIBGYOR, what number colour is green?
33. 33.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a shadow of ice (c) a small rainbow (d) a magnet
34. 34.True or false: yeast is not needed for the water rainbow. (a) False (b) True
35. 35.⚖️ 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) True (b) False
36. 36.🧺 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 mirror (d) a sheet of white paper
37. 37.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) turmeric powder (d) a sheet of white paper
38. 38.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) tiny drops of water (c) many colours mixed (d) only yellow light
39. 39.⚖️ 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 time of day
40. 40.📘 What do we call light bending as it passes from air into water? (a) reflection (b) magnetism (c) evaporation (d) refraction

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