Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 358 · 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.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.🌈 How many colours do we name in a rainbow (VIBGYOR)?
4. 4.🌈 In VIBGYOR, what number colour is indigo?
5. 5.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
6. 6.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
7. 7.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a small rainbow (c) a shadow of ice (d) snow falling
8. 8.🛟 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
9. 9.🧺 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) a magnet (d) bright sunlight
10. 10.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a balloon (c) a clear glass of water (d) a battery cell
11. 11.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a balloon (c) a sunny window (d) bright sunlight
12. 12.⚖️ 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 glass (b) brightness of rainbow (c) the amount of water
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a sunny window (c) a clear glass of water (d) turmeric powder
15. 15.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
16. 16.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) violet (c) red (d) blue
17. 17.True or false: a clear glass of water is needed for the water rainbow. (a) False (b) True
18. 18.🌈 In VIBGYOR, what number colour is yellow?
19. 19.⚖️ 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) False (b) True
20. 20.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a magnet (c) bright sunlight (d) a sunny window
21. 21.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the water is coloured (c) water splits the light (d) the paper makes colours
22. 22.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
23. 23.⚖️ 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) False (b) True
24. 24.⚖️ 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
25. 25.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny bits of dust (c) many colours mixed (d) tiny drops of water
26. 26.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a sunny window (c) a clear glass of water (d) bright sunlight
27. 27.🌈 In VIBGYOR, what number colour is orange?
28. 28.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it does not fall (d) so it gets hot
29. 29.True or false: a mirror is needed for the water rainbow. (a) False (b) True
30. 30.🌈 In VIBGYOR, what number colour is red?
31. 31.⚖️ 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 glass (b) the same window (c) the amount of water (d) brightness of rainbow
32. 32.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (a) True (b) False
33. 33.🌈 In VIBGYOR, what number colour is green?
34. 34.True or false: yeast 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? Which of these is the one thing we change? (a) the same glass (b) the same white paper (c) the amount of water (d) brightness of rainbow
36. 36.⚖️ 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 measure it (b) we keep it the same (c) we change it
37. 37.🧺 Do we need a balloon 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? Which of these is kept the same? (a) the amount of water (b) the same window (c) brightness of rainbow
39. 39.⚖️ 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 time of day
40. 40.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True

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