Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 75 · 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.⚖️ 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
2. 2.⚖️ 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
3. 3.🌈 How many colours do we name in a rainbow (VIBGYOR)?
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a sheet of white paper (c) a magnet (d) turmeric powder
6. 6.🌈 In VIBGYOR, what number colour is blue?
7. 7.🌦️ To see a rainbow in the sky, where must the Sun be? (a) behind you (b) under the ground (c) straight above you (d) in front of you
8. 8.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
9. 9.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
10. 10.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
11. 11.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a balloon (c) a sheet of white paper (d) a sunny window
12. 12.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a balloon (c) a magnet (d) a clear glass of water
13. 13.🧺 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) a clear glass of water
14. 14.🛟 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
15. 15.🌈 In VIBGYOR, what number colour is red?
16. 16.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) snow falling (c) a magnet (d) a small rainbow
17. 17.📘 What do we call light bending as it passes from air into water? (a) magnetism (b) evaporation (c) refraction (d) reflection
18. 18.⚖️ 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
19. 19.⚖️ 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
20. 20.True or false: a sunny window is needed for the water rainbow. (a) True (b) False
21. 21.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the water is coloured (c) the paper makes colours (d) water splits the light
22. 22.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is what we measure. (a) True (b) False
23. 23.🌈 In VIBGYOR, what number colour is violet?
24. 24.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) yeast (c) a clear glass of water (d) a sunny window
25. 25.⚖️ 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
26. 26.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
27. 27.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
28. 28.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) the rainbow fades (c) it turns all red (d) it turns brighter
29. 29.True or false: a sheet of white paper is needed for the water rainbow. (a) True (b) False
30. 30.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
31. 31.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) clouds (c) prisms (d) balloons
32. 32.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) look at it in a mirror (d) stare at the Sun
33. 33.⚖️ 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
34. 34.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a magnet (b) a sunny window (c) a sheet of white paper (d) bright sunlight
37. 37.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for the water rainbow? (a) a magnet (b) a sheet of white paper (c) bright sunlight (d) a clear glass of water
39. 39.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a battery cell (c) a clear glass of water (d) bright sunlight
40. 40.☀️ 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

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