Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 428 · 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.🌈 In VIBGYOR, what number colour is blue?
2. 2.🔮 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
3. 3.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
4. 4.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
5. 5.🌈 In VIBGYOR, what number colour is violet?
6. 6.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it gets hot (c) so it does not fall (d) so the Sun moves
7. 7.☀️ What is white sunlight really made of? (a) tiny drops of water (b) many colours mixed (c) only yellow light (d) tiny bits of dust
8. 8.🌈 How many colours do we name in a rainbow (VIBGYOR)?
9. 9.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a mirror (c) a clear glass of water (d) a magnet
10. 10.⚖️ 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 white paper (c) brightness of rainbow (d) the time of day
11. 11.⚖️ 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
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.🧺 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) a clear glass of water
14. 14.True or false: yeast is needed for the water rainbow. (a) True (b) False
15. 15.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) red (b) green (c) blue (d) violet
16. 16.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) bright sunlight (c) a sunny window (d) a clear glass of water
17. 17.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) look at it in a mirror (d) never look at the Sun
18. 18.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) clouds (d) magnets
19. 19.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) turmeric powder (c) a sheet of white paper (d) a balloon
20. 20.⚖️ 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
21. 21.⚖️ 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 measure it (c) we change it
22. 22.⚖️ 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 same glass (d) the amount of water
23. 23.🌈 In VIBGYOR, what number colour is red?
24. 24.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
25. 25.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a clear glass of water (c) a sunny window (d) turmeric powder
27. 27.True or false: yeast is not needed for the water rainbow. (a) False (b) True
28. 28.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) orange (c) yellow (d) violet
29. 29.⚖️ 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
30. 30.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) a sunny window (d) a balloon
31. 31.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the paper makes colours (c) the water is coloured (d) water splits the light
32. 32.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
33. 33.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
34. 34.True or false: a sheet of white paper is needed for the water rainbow. (a) True (b) False
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) False (b) True
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 magnet (d) a sheet of white paper
37. 37.⚖️ 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) False (b) True
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
40. 40.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) a sunny window (c) a clear glass of water (d) a sheet of white paper

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