Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 335 · 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.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) look at it through glass (d) never look at the Sun
2. 2.⚖️ 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) brightness of rainbow (b) the same window (c) the amount of water (d) the time of day
3. 3.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) magnets (d) clouds
4. 4.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) turmeric powder (c) a sheet of white paper (d) a clear glass of water
5. 5.⚖️ 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) True (b) False
6. 6.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a clear glass of water (c) bright sunlight (d) a sheet of white paper
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is the one thing we change. (a) False (b) True
8. 8.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
9. 9.⚖️ 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 window (b) the amount of water (c) brightness of rainbow
10. 10.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
11. 11.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
12. 12.🧺 Which of these is needed for the water rainbow? (a) yeast (b) turmeric powder (c) a clear glass of water (d) a balloon
13. 13.⚖️ 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) brightness of rainbow (c) the same glass
14. 14.🧺 Which of these is not needed for the water rainbow? (a) yeast (b) bright sunlight (c) a sunny window (d) a clear glass of water
15. 15.🌈 In VIBGYOR, what number colour is yellow?
16. 16.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
17. 17.⚖️ 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
18. 18.🌈 How many colours do we name in a rainbow (VIBGYOR)?
19. 19.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) bright sunlight (c) a magnet (d) a balloon
20. 20.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
21. 21.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (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 window is the one thing we change. (a) False (b) True
23. 23.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) red (c) blue (d) green
24. 24.True or false: yeast is needed for the water rainbow. (a) True (b) False
25. 25.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a sunny window (c) a balloon (d) a battery cell
26. 26.⚖️ 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) True (b) False
27. 27.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a battery cell (c) bright sunlight (d) a clear glass of water
28. 28.True or false: turmeric powder is needed for the water rainbow. (a) False (b) True
29. 29.True or false: turmeric powder is not needed for the water rainbow. (a) True (b) False
30. 30.True or false: a clear glass of water is 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 the one thing we change. (a) True (b) False
32. 32.⚖️ 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) False (b) True
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) turmeric powder (d) a sunny window
34. 34.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
35. 35.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
36. 36.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
37. 37.⚖️ 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
38. 38.🌈 In VIBGYOR, what number colour is green?
39. 39.⚖️ 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
40. 40.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed

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