Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 821 · 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.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a magnet (d) a shadow of ice
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a sunny window (c) bright sunlight (d) a mirror
4. 4.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) magnets (c) balloons (d) prisms
5. 5.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
6. 6.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
7. 7.🧺 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) a magnet
8. 8.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
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 measure it (c) we change it
10. 10.🌈 How many colours do we name in a rainbow (VIBGYOR)?
11. 11.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) tiny drops of water (c) only yellow light (d) many colours mixed
12. 12.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) turmeric powder (c) a sunny window (d) a balloon
13. 13.True or false: a balloon is not needed for the water rainbow. (a) True (b) False
14. 14.🛟 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 does not fall (d) so it gets hot
15. 15.⚖️ 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
16. 16.⚖️ 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
17. 17.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a sheet of white paper (d) a battery cell
18. 18.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) orange (c) violet (d) red
19. 19.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) the rainbow fades (c) it floats away (d) it turns brighter
20. 20.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
21. 21.⚖️ 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 window (b) the amount of water (c) brightness of rainbow (d) the time of day
22. 22.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
23. 23.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a magnet (c) a sunny window (d) a sheet of white paper
24. 24.🌈 In VIBGYOR, what number colour is red?
25. 25.🌈 In VIBGYOR, what number colour is green?
26. 26.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a sunny window (c) a balloon (d) bright sunlight
27. 27.⚖️ 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) True (b) False
28. 28.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a balloon (c) a sheet of white paper (d) bright sunlight
29. 29.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) green (c) red (d) violet
30. 30.True or false: turmeric powder is not needed for the water rainbow. (a) True (b) False
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.⚖️ 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
34. 34.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the water is coloured (c) water splits the light (d) the paper makes colours
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.⚖️ 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 change it (c) we keep it the same
37. 37.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
38. 38.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a battery cell (d) a sheet of white paper
39. 39.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
40. 40.True or false: a mirror is needed for the water rainbow. (a) True (b) False

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