Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 230 · 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.🔮 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
2. 2.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a magnet (c) a sunny window (d) a sheet of white paper
3. 3.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a sheet of white paper (c) a mirror (d) a balloon
4. 4.⚖️ 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
5. 5.🌈 In VIBGYOR, what number colour is red?
6. 6.⚖️ 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 time of day (c) the amount of water (d) the same glass
7. 7.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sunny window (c) turmeric powder (d) bright sunlight
8. 8.🌈 How many colours do we name in a rainbow (VIBGYOR)?
9. 9.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
10. 10.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a small rainbow (c) snow falling (d) a shadow of ice
11. 11.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
12. 12.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
13. 13.True or false: yeast is not needed for the water rainbow. (a) False (b) True
14. 14.☀️ What is white sunlight really made of? (a) tiny drops of water (b) many colours mixed (c) only yellow light (d) tiny bits of dust
15. 15.⚖️ 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) brightness of rainbow (c) the amount of water (d) the same window
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.⚖️ 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
18. 18.True or false: yeast is needed for the water rainbow. (a) False (b) True
19. 19.🌈 In VIBGYOR, what number colour is violet?
20. 20.🌈 In VIBGYOR, what number colour is indigo?
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
25. 25.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) turmeric powder (c) bright sunlight (d) 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 window”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) green (d) red
28. 28.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a balloon
29. 29.True or false: a balloon is needed for the water rainbow. (a) True (b) False
30. 30.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the glass is painted (c) water splits the light (d) the water is coloured
31. 31.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) prisms (c) balloons (d) clouds
32. 32.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
33. 33.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) behind you (c) in front of you (d) under the ground
34. 34.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) look at it in a mirror (d) stare at the Sun
35. 35.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
36. 36.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
37. 37.True or false: a sunny window is needed for the water rainbow. (a) True (b) False
38. 38.🌈 In VIBGYOR, what number colour is blue?
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) False (b) True
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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