Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 642 · 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.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a flower stem (b) a paper towel (c) a cotton thread (d) a steel spoon
3. 3.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through the air (c) through tiny stem tubes (d) it rains on them
4. 4.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) yeast (b) a white flower (c) a few hours of waiting (d) food colour
5. 5.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) it sinks at once (d) nothing ever happens
6. 6.⚖️ 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) True (b) False
7. 7.💧 Which of these does not let water climb? (a) a cotton thread (b) a piece of chalk (c) a plastic ruler (d) a paper towel
8. 8.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
9. 9.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
10. 10.🧺 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) turmeric powder (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 kind of flower”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🔮 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 fall off at once (c) they turn two colours (d) they stay white
13. 13.⚖️ 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 what we measure. (a) False (b) True
14. 14.🧺 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) a magnet (d) a glass of water
15. 15.🛟 Who should trim the flower stem? (a) a pet (b) anyone, without looking (c) a grown-up (d) a toddler
16. 16.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
17. 17.🔍 Which is the odd one out? (a) a paper towel (b) a strip of cloth (c) a cotton thread (d) a plastic ruler
18. 18.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
20. 20.🛟 What should you do after handling food colour? (a) rub your eyes (b) wipe them on walls (c) wash your hands (d) lick your fingers
21. 21.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
22. 22.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
23. 23.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
24. 24.⚖️ 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 room it stands in (c) the length of the stem (d) the amount of colour
25. 25.💧 Which of these lets water climb up it? (a) a piece of foil (b) a paper towel (c) a glass marble (d) a steel spoon
26. 26.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
27. 27.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals lose water to air (c) petals like colour (d) the stem is hot
28. 28.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
29. 29.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
30. 30.🔍 Which is the odd one out? (a) a cotton thread (b) a piece of foil (c) a flower stem (d) a paper towel
31. 31.💧 Which of these lets water climb up it? (a) a piece of foil (b) a rubber eraser (c) a plastic ruler (d) a piece of chalk
32. 32.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
33. 33.💧 Which of these does not let water climb? (a) a piece of chalk (b) a piece of foil (c) a cotton thread (d) a flower stem
34. 34.True or false: a glass of water is needed for the coloured flower experiment. (a) True (b) False
35. 35.True or false: a piece of foil lets water climb up it. (a) True (b) False
36. 36.True or false: a paper towel does not let water climb. (a) False (b) True
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.💧 Which of these lets water climb up it? (a) a piece of foil (b) a steel spoon (c) a sugar cube (d) a rubber eraser
39. 39.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) food colour (d) a few hours of waiting
40. 40.⚖️ 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 kept the same. (a) True (b) False

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