Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 750 · 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 it turns blue (b) so it gets hot (c) so it does not fall (d) so the Sun moves
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) the same white paper (b) the time of day (c) the amount of water (d) the same window
3. 3.True or false: a balloon is needed for the water rainbow. (a) False (b) True
4. 4.🌈 How many colours do we name in a rainbow (VIBGYOR)?
5. 5.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is kept the same. (a) True (b) False
6. 6.⚖️ 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 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.⚖️ 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 measure it (b) we keep it the same (c) we change it
9. 9.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
10. 10.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) never look at the Sun (d) look at it in a mirror
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a clear glass of water (c) a sheet of white paper (d) a balloon
13. 13.🌈 In VIBGYOR, what number colour is blue?
14. 14.⚖️ 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 change it (c) we measure it
15. 15.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it floats away (d) it turns brighter
16. 16.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a shadow of ice (c) a small rainbow (d) snow falling
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.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
19. 19.🌈 In VIBGYOR, what number colour is red?
20. 20.⚖️ 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 same window (b) the amount of water (c) brightness of rainbow (d) the same glass
21. 21.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
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 measure it (b) we keep it the same (c) we change it
23. 23.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a magnet (c) a sheet of white paper (d) turmeric powder
24. 24.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) under the ground (c) straight above you (d) behind you
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) a magnet (c) yeast (d) turmeric powder
27. 27.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a magnet (c) a clear glass of water (d) a sheet of white paper
28. 28.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
29. 29.☀️ What is white sunlight really made of? (a) tiny drops of water (b) many colours mixed (c) tiny bits of dust (d) only yellow light
30. 30.True or false: a mirror is needed for the water rainbow. (a) False (b) True
31. 31.🌈 In VIBGYOR, what number colour is violet?
32. 32.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
33. 33.🌈 In VIBGYOR, what number colour is orange?
34. 34.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
35. 35.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) yeast (c) a magnet (d) a clear glass of water
36. 36.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) red (c) green (d) blue
37. 37.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
38. 38.⚖️ 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
39. 39.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a sheet of white paper (c) a sunny window (d) bright sunlight

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