Rainbow Science Experiment Worksheet

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

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