Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 994 · 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.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the paper makes colours (c) the glass is painted (d) water splits the light
2. 2.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) True (b) False
3. 3.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a mirror (c) a sheet of white paper (d) bright sunlight
5. 5.True or false: turmeric powder is needed for the water rainbow. (a) False (b) True
6. 6.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) True (b) False
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) a sheet of white paper (d) yeast
8. 8.⚖️ 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 keep it the same (c) we change it
9. 9.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) clouds (c) magnets (d) prisms
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is what we measure. (a) False (b) True
11. 11.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
12. 12.🧺 Which of these is needed for the water rainbow? (a) a sunny window (b) a battery cell (c) yeast (d) a magnet
13. 13.🌈 How many colours do we name in a rainbow (VIBGYOR)?
14. 14.True or false: yeast is not needed for the water rainbow. (a) True (b) False
15. 15.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
16. 16.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (c) look at it in a mirror (d) never look at the Sun
17. 17.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
18. 18.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) a mirror (d) a clear glass of water
19. 19.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
20. 20.True or false: a balloon is needed for the water rainbow. (a) False (b) True
21. 21.🌈 In VIBGYOR, what number colour is indigo?
22. 22.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it gets hot (c) so it turns blue (d) so the Sun moves
23. 23.🌈 In VIBGYOR, what number colour is blue?
24. 24.📘 What do we call light bending as it passes from air into water? (a) magnetism (b) reflection (c) refraction (d) evaporation
25. 25.True or false: turmeric powder is not needed for the water rainbow. (a) True (b) False
26. 26.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) bright sunlight (c) a clear glass of water (d) a sunny window
27. 27.🌈 In VIBGYOR, what number colour is green?
28. 28.⚖️ 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 change it (c) we keep it the same
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) brightness of rainbow (b) the time of day (c) the amount of water
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (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 amount of water”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.☀️ What is white sunlight really made of? (a) many colours mixed (b) tiny drops of water (c) only yellow light (d) tiny bits of dust
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.⚖️ 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 amount of water (b) the same glass (c) the same white paper (d) the same window
35. 35.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
36. 36.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
37. 37.🌦️ To see a rainbow in the sky, where must the Sun be? (a) under the ground (b) in front of you (c) behind you (d) straight above you
38. 38.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a clear glass of water (c) a sheet of white paper (d) turmeric powder
39. 39.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
40. 40.⚖️ 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 same white paper (b) the amount of water (c) brightness of rainbow

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