Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 357 · 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.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it floats away (c) it turns all red (d) it turns brighter
2. 2.True or false: a sunny window is not needed for the water rainbow. (a) False (b) True
3. 3.🌈 How many colours do we name in a rainbow (VIBGYOR)?
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) a sunny window (c) bright sunlight (d) a sheet of white paper
5. 5.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a shadow of ice (c) snow falling (d) a small rainbow
6. 6.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) stare at the Sun (d) never look at the Sun
7. 7.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
8. 8.True or false: a balloon is needed for the water rainbow. (a) True (b) False
9. 9.🌈 In VIBGYOR, what number colour is yellow?
10. 10.☀️ What is white sunlight really made of? (a) tiny drops of water (b) tiny bits of dust (c) only yellow light (d) many colours mixed
11. 11.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
12. 12.True or false: a sheet of white paper is needed for the water rainbow. (a) True (b) False
13. 13.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
14. 14.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
15. 15.⚖️ 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 amount of water (c) the same glass (d) the same white paper
16. 16.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) turmeric powder (c) a balloon (d) a battery cell
17. 17.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a sheet of white paper (c) turmeric powder (d) a magnet
18. 18.🌈 In VIBGYOR, what number colour is green?
19. 19.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) green (c) red (d) violet
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) False (b) True
21. 21.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so the Sun moves (d) so it does not fall
22. 22.True or false: bright sunlight is needed for the water rainbow. (a) False (b) True
23. 23.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a magnet (c) a clear glass of water (d) a sunny window
24. 24.True or false: a mirror is needed for the water rainbow. (a) False (b) True
25. 25.⚖️ 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 keep it the same (c) we measure it
26. 26.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is what we measure. (a) False (b) True
27. 27.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
28. 28.⚖️ 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
29. 29.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) yellow (c) violet (d) red
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the same white paper (c) the amount of water
31. 31.⚖️ 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
32. 32.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
33. 33.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) water splits the light (c) the paper makes colours (d) the glass is painted
34. 34.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a magnet (c) bright sunlight (d) yeast
35. 35.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
36. 36.🌈 In VIBGYOR, what number colour is indigo?
37. 37.True or false: a balloon is not needed for the water rainbow. (a) True (b) False
38. 38.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) turmeric powder (b) bright sunlight (c) a sunny window (d) a clear glass of water
39. 39.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) magnets (c) clouds (d) balloons
40. 40.🧺 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

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