Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 723 · 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 “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🌈 How many colours do we name in a rainbow (VIBGYOR)?
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.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True
5. 5.🌈 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
6. 6.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
7. 7.⚖️ 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) brightness of rainbow (c) the amount of water
8. 8.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a battery cell (c) bright sunlight (d) a clear glass of water
9. 9.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is what we measure. (a) False (b) True
10. 10.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) red (c) violet (d) yellow
11. 11.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a magnet (d) a shadow of ice
12. 12.True or false: a mirror is not needed for the water rainbow. (a) False (b) True
13. 13.⚖️ 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 amount of water (b) the same window (c) the same glass (d) brightness of rainbow
14. 14.⚖️ 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 keep it the same (b) we measure it (c) we change it
15. 15.⚖️ 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
16. 16.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) bright sunlight (d) turmeric powder
17. 17.True or false: a clear glass of water is needed for the water rainbow. (a) True (b) False
18. 18.🧺 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
19. 19.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
20. 20.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a balloon (c) a sheet of white paper (d) a magnet
21. 21.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
22. 22.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it gets hot (c) so the Sun moves (d) so it turns blue
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
25. 25.⚖️ 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
26. 26.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
27. 27.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) clouds (d) magnets
28. 28.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it floats away (c) it turns all red (d) it turns brighter
31. 31.🌈 In VIBGYOR, what number colour is red?
32. 32.⚖️ 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 time of day (c) the same white paper (d) brightness of rainbow
33. 33.🧺 Which of these is not needed for the water rainbow? (a) turmeric powder (b) a sheet of white paper (c) bright sunlight (d) a sunny window
34. 34.🌈 In VIBGYOR, what number colour is violet?
35. 35.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a mirror (c) a sunny window (d) a battery cell
36. 36.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a clear glass of water (c) a magnet (d) yeast
37. 37.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
38. 38.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed

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