Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 734 · 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 the Sun moves (b) so it turns blue (c) so it gets hot (d) so it does not fall
2. 2.🌈 In VIBGYOR, what number colour is blue?
3. 3.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) red (b) violet (c) green (d) blue
4. 4.🧺 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 clear glass of water (d) a battery cell
5. 5.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) many colours mixed (c) tiny drops of water (d) only yellow light
6. 6.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) True (b) False
7. 7.🌈 How many colours do we name in a rainbow (VIBGYOR)?
8. 8.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
9. 9.⚖️ 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 white paper (c) the same glass (d) the amount of water
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a sheet of white paper (c) a battery cell (d) a magnet
12. 12.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sheet of white paper (c) a sunny window (d) a mirror
13. 13.True or false: a sheet of white paper 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? True or false: the same glass is the one thing we change. (a) True (b) False
15. 15.True or false: a mirror is needed for the water rainbow. (a) False (b) True
16. 16.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.True or false: a magnet is needed for the water rainbow. (a) False (b) True
19. 19.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a small rainbow (c) a shadow of ice (d) a magnet
20. 20.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the paper makes colours (c) the water is coloured (d) the glass is painted
21. 21.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) prisms (d) clouds
22. 22.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) a magnet (d) a clear glass of water
23. 23.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
24. 24.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (c) never look at the Sun (d) look at it in a mirror
26. 26.⚖️ 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 keep it the same (b) we change it (c) we measure it
27. 27.True or false: a clear glass of water is needed for the water rainbow. (a) False (b) True
28. 28.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) behind you (c) under the ground (d) straight above you
29. 29.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) turmeric powder (b) a sunny window (c) a sheet of white paper (d) bright sunlight
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a sheet of white paper (d) yeast
31. 31.🌈 In VIBGYOR, what number colour is green?
32. 32.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a mirror (c) a sunny window (d) a balloon
33. 33.🌈 In VIBGYOR, what number colour is orange?
34. 34.🌈 In VIBGYOR, what number colour is indigo?
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) yeast (c) a balloon (d) bright sunlight
38. 38.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
39. 39.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
40. 40.🌈 In VIBGYOR, what number colour is violet?

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