Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 54 · 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.⚖️ 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) True (b) False
2. 2.True or false: a piece of foil does not let water climb. (a) False (b) True
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 amount of colour (b) the length of the stem (c) time for colour to show
4. 4.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a white flower (c) a few hours of waiting (d) a balloon
5. 5.⚖️ 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
6. 6.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) magnetism (c) capillary action (d) evaporation
7. 7.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
8. 8.💧 Which of these does not let water climb? (a) a sugar cube (b) a cotton thread (c) a strip of cloth (d) a piece of foil
9. 9.💧 Which of these does not let water climb? (a) a cotton thread (b) a steel spoon (c) a strip of cloth (d) a piece of chalk
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the kind of flower (c) the length of the stem
11. 11.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.⚖️ 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
14. 14.🔍 Which is the odd one out? (a) a glass marble (b) a strip of cloth (c) a cotton thread (d) a flower stem
15. 15.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) it turns to plastic (c) colour climbs up it (d) nothing ever happens
16. 16.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
17. 17.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the stem turns blue (c) no colour change (d) the petals turn red
18. 18.💧 Which of these does not let water climb? (a) a rubber eraser (b) a piece of chalk (c) a cotton thread (d) a sugar cube
19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
20. 20.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
21. 21.⚖️ 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 what we measure. (a) False (b) True
22. 22.True or false: a glass marble lets water climb up it. (a) True (b) False
23. 23.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) food colour (d) a mirror
24. 24.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the room it stands in (b) time for colour to show (c) the amount of colour (d) the length of the stem
25. 25.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
26. 26.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
27. 27.🛟 What should you do after handling food colour? (a) wipe them on walls (b) rub your eyes (c) lick your fingers (d) wash your hands
28. 28.True or false: a sugar cube does not let water climb. (a) True (b) False
29. 29.🌼 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
30. 30.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is the one thing we change. (a) True (b) False
31. 31.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the room it stands in
32. 32.⚖️ 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 the one thing we change. (a) True (b) False
33. 33.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a steel spoon (c) a cotton thread (d) a rubber eraser
34. 34.⚖️ 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 measure it (b) we change it (c) we keep it the same
35. 35.💧 Which of these lets water climb up it? (a) a piece of chalk (b) a glass marble (c) a piece of foil (d) a plastic ruler
36. 36.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
37. 37.🛟 Who should trim the flower stem? (a) a pet (b) a grown-up (c) anyone, without looking (d) a toddler
38. 38.True or false: a cotton thread lets water climb up it. (a) True (b) False
39. 39.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
40. 40.True or false: a balloon is needed for the coloured flower experiment. (a) False (b) True

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