Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 630 · 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.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a few hours of waiting (c) food colour (d) a magnet
2. 2.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals like colour (c) petals lose water to air (d) the stem is hot
3. 3.⚖️ 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 kind of flower (b) time for colour to show (c) the length of the stem
4. 4.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
5. 5.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is kept the same. (a) False (b) True
6. 6.🛟 Who should trim the flower stem? (a) a pet (b) a grown-up (c) a toddler (d) anyone, without looking
7. 7.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.⚖️ 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) False (b) True
9. 9.🔍 Which is the odd one out? (a) a piece of chalk (b) a piece of foil (c) a cotton thread (d) a strip of cloth
10. 10.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a glass marble (c) a piece of foil (d) a cotton thread
11. 11.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is what we measure. (a) False (b) True
12. 12.True or false: a flower stem lets water climb up it. (a) True (b) False
13. 13.⚖️ 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 amount of water (b) the kind of flower (c) time for colour to show (d) the length of the stem
14. 14.💧 Which of these lets water climb up it? (a) a glass marble (b) a rubber eraser (c) a flower stem (d) a piece of foil
15. 15.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
16. 16.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) it is sprayed on (c) it rains on them (d) through the air
17. 17.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
18. 18.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a few hours of waiting (c) a glass of water (d) yeast
19. 19.⚖️ 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
20. 20.⚖️ 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 change it (c) we keep it the same
21. 21.🔍 Which is the odd one out? (a) a plastic ruler (b) a piece of chalk (c) a sugar cube (d) a cotton thread
22. 22.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
23. 23.💧 Which of these does not let water climb? (a) a piece of chalk (b) a flower stem (c) a glass marble (d) a sugar cube
24. 24.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
26. 26.True or false: a plastic ruler does not let water climb. (a) False (b) True
27. 27.💧 Which of these lets water climb up it? (a) a glass marble (b) a sugar cube (c) a piece of foil (d) a steel spoon
28. 28.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) a few hours of waiting (d) a battery cell
29. 29.🔍 Which is the odd one out? (a) a glass marble (b) a plastic ruler (c) a steel spoon (d) a piece of chalk
30. 30.🔮 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 fall off at once (d) they turn two colours
31. 31.True or false: a balloon is needed for the coloured flower experiment. (a) False (b) True
32. 32.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
33. 33.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a white flower (c) a mirror (d) a few hours of waiting
34. 34.💧 Which of these does not let water climb? (a) a cotton thread (b) a flower stem (c) a piece of chalk (d) a piece of foil
35. 35.True or false: a glass marble lets water climb up it. (a) False (b) True
36. 36.💧 Which of these lets water climb up it? (a) a strip of cloth (b) a plastic ruler (c) a rubber eraser (d) a piece of foil
37. 37.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a mirror (c) a glass of water (d) a magnet
38. 38.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
39. 39.🛟 What should you do after handling food colour? (a) wash your hands (b) lick your fingers (c) wipe them on walls (d) rub your eyes
40. 40.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True

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