Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 909 · 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? True or false: the amount of water is the one thing we change. (a) True (b) False
2. 2.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so the Sun moves (d) so it turns blue
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a balloon (c) a sunny window (d) turmeric powder
5. 5.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) snow falling (c) a magnet (d) a small rainbow
6. 6.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) bright sunlight (d) a balloon
7. 7.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a magnet (c) a clear glass of water (d) a sunny window
8. 8.⚖️ 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 change it (c) we measure it
9. 9.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) red (c) green (d) blue
10. 10.⚖️ 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) brightness of rainbow (d) the same white paper
11. 11.🌈 How many colours do we name in a rainbow (VIBGYOR)?
12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) a battery cell
14. 14.⚖️ 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 measure it (c) we change it
15. 15.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
18. 18.🔮 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
19. 19.True or false: a clear glass of water is needed for the water rainbow. (a) False (b) True
20. 20.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a mirror (c) bright sunlight (d) a clear glass of water
21. 21.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) stare at the Sun (d) look at it in a mirror
22. 22.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
23. 23.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sunny window (d) yeast
26. 26.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) yeast (d) a sheet of white paper
27. 27.🧺 Which of these is not needed for the water rainbow? (a) a mirror (b) a clear glass of water (c) bright sunlight (d) a sunny window
28. 28.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) yeast (c) bright sunlight (d) turmeric powder
29. 29.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
30. 30.🌦️ To see a rainbow in the sky, where must the Sun be? (a) under the ground (b) in front of you (c) straight above you (d) behind you
31. 31.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
32. 32.🌈 In VIBGYOR, what number colour is yellow?
33. 33.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) tiny drops of water (c) many colours mixed (d) only yellow light
34. 34.True or false: a mirror is needed for the water rainbow. (a) True (b) False
35. 35.⚖️ 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) False (b) True
36. 36.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
37. 37.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a balloon (d) a sheet of white paper
38. 38.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) water splits the light (d) the paper makes colours
39. 39.⚖️ 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 measure it (c) we change it
40. 40.⚖️ 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

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