Rainbow Science Experiment Worksheet

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

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