Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 345 · 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.True or false: a mirror is needed for the water rainbow. (a) False (b) True
2. 2.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) snow falling (c) a small rainbow (d) a shadow of ice
3. 3.⚖️ 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 white paper (b) brightness of rainbow (c) the amount of water (d) the same window
4. 4.🌈 In VIBGYOR, what number colour is yellow?
5. 5.⚖️ 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
6. 6.🧺 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) a balloon (d) a sheet of white paper
7. 7.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a balloon (c) a magnet (d) turmeric powder
8. 8.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a sunny window (c) bright sunlight (d) turmeric powder
9. 9.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it does not fall (c) so it turns blue (d) so it gets hot
10. 10.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) red (c) violet (d) blue
11. 11.🌈 In VIBGYOR, what number colour is indigo?
12. 12.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) 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 keep it the same (b) we measure it (c) we change it
14. 14.⚖️ 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 measure it (c) we change it
15. 15.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) magnets (c) balloons (d) prisms
16. 16.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
17. 17.🧺 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 sunny window (d) a mirror
18. 18.🌈 How many colours do we name in a rainbow (VIBGYOR)?
19. 19.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) a clear glass of water (d) a battery cell
20. 20.⚖️ 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) brightness of rainbow (b) the same glass (c) the same white paper (d) the amount of water
21. 21.⚖️ 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
22. 22.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
23. 23.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
24. 24.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny drops of water (c) tiny bits of dust (d) many colours mixed
25. 25.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
26. 26.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
27. 27.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a balloon
28. 28.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the glass is painted (c) the water is coloured (d) the paper makes colours
29. 29.🌈 In VIBGYOR, what number colour is blue?
30. 30.🌈 In VIBGYOR, what number colour is orange?
31. 31.⚖️ 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
32. 32.True or false: yeast is not needed for the water rainbow. (a) True (b) False
33. 33.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the water rainbow? (a) yeast (b) bright sunlight (c) a clear glass of water (d) a sunny window
35. 35.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
36. 36.True or false: a magnet is needed for the water rainbow. (a) True (b) False
37. 37.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a balloon (c) turmeric powder (d) bright sunlight
38. 38.🌈 In VIBGYOR, what number colour is violet?
39. 39.True or false: a clear glass of water is needed for the water rainbow. (a) True (b) False
40. 40.⚖️ 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 measure it (c) we keep it the same

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