Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 190 · 40 questions

What you do (Water climbs thin tubes): 1. Mix food colour into a glass of water. 2. An adult trims the flower stem and stands it in the coloured water. 3. Check the petals every few hours and draw what you see. 4. Wash your hands after handling food colour.

1. 1.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they stay white (c) they turn two colours (d) they fall off at once
2. 2.💧 Which of these does not let water climb? (a) a paper towel (b) a sugar cube (c) a piece of chalk (d) a rubber eraser
3. 3.💧 Which of these does not let water climb? (a) a steel spoon (b) a sugar cube (c) a flower stem (d) a paper towel
4. 4.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wipe them on walls (d) wash your hands
5. 5.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) turmeric powder (c) food colour (d) a white flower
6. 6.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
7. 7.True or false: a piece of chalk does not let water climb. (a) False (b) True
8. 8.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it sinks at once (c) nothing ever happens (d) it turns to plastic
9. 9.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
10. 10.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) yeast (b) a few hours of waiting (c) food colour (d) a glass of water
11. 11.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🔍 Which is the odd one out? (a) a plastic ruler (b) a sugar cube (c) a paper towel (d) a strip of cloth
14. 14.🔍 Which is the odd one out? (a) a flower stem (b) a sugar cube (c) a glass marble (d) a cotton thread
15. 15.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
16. 16.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a few hours of waiting (c) a balloon (d) a white flower
17. 17.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a few hours of waiting (c) a white flower (d) a mirror
18. 18.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
19. 19.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
20. 20.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the room it stands in (c) the amount of water (d) the kind of flower
21. 21.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) no colour change (c) the petals turn red (d) the flower glows
22. 22.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a grown-up (d) a pet
23. 23.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) True (b) False
24. 24.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is what we measure. (a) False (b) True
25. 25.💧 Which of these lets water climb up it? (a) a strip of cloth (b) a rubber eraser (c) a plastic ruler (d) a glass marble
26. 26.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the amount of water (b) the length of the stem (c) time for colour to show
27. 27.True or false: a sugar cube lets water climb up it. (a) True (b) False
28. 28.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
29. 29.True or false: a magnet is not needed for the coloured flower experiment. (a) False (b) True
30. 30.💧 Which of these does not let water climb? (a) a piece of chalk (b) a cotton thread (c) a piece of foil (d) a flower stem
31. 31.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is the one thing we change. (a) True (b) False
32. 32.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
33. 33.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
34. 34.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals lose water to air (c) petals like colour (d) petals are magnetic
35. 35.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
36. 36.🧺 Which of these is needed for the coloured flower experiment? (a) food colour (b) a balloon (c) a mirror (d) yeast
37. 37.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a few hours of waiting (c) a balloon (d) a glass of water
38. 38.🔍 Which is the odd one out? (a) a rubber eraser (b) a sugar cube (c) a piece of foil (d) a steel spoon
39. 39.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the length of the stem (b) the amount of water (c) time for colour to show (d) the kind of flower
40. 40.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed

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