Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 77 · 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.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
2. 2.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) a battery cell (c) a balloon (d) turmeric powder
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.True or false: food colour is needed for the coloured flower experiment. (a) False (b) True
5. 5.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals like colour (c) the stem is hot (d) petals lose water to air
6. 6.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
7. 7.🔮 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
8. 8.True or false: a battery cell is not needed for the coloured flower experiment. (a) True (b) False
9. 9.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
10. 10.True or false: a steel spoon does not let water climb. (a) False (b) True
11. 11.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) magnetism (c) capillary action (d) evaporation
12. 12.True or false: a sugar cube does not let water climb. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) a sugar cube (b) a piece of chalk (c) a paper towel (d) a piece of foil
14. 14.True or false: a plastic ruler lets water climb up it. (a) True (b) False
15. 15.⚖️ 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
16. 16.💧 Which of these lets water climb up it? (a) a glass marble (b) a strip of cloth (c) a steel spoon (d) a plastic ruler
17. 17.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a white flower (c) a glass of water (d) a battery cell
18. 18.⚖️ 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
19. 19.True or false: a magnet is needed for the coloured flower experiment. (a) False (b) True
20. 20.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they fall off at once (c) they all turn green (d) they turn two colours
21. 21.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) yeast (c) a balloon (d) a glass of water
22. 22.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
23. 23.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
24. 24.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is kept the same. (a) True (b) False
25. 25.💧 Which of these does not let water climb? (a) a piece of chalk (b) a rubber eraser (c) a strip of cloth (d) a flower stem
26. 26.🛟 Who should trim the flower stem? (a) a pet (b) anyone, without looking (c) a toddler (d) a grown-up
27. 27.⚖️ 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 amount of water
28. 28.⚖️ 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 room it stands in (c) the amount of colour (d) the amount of water
29. 29.⚖️ 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 change it (b) we keep it the same (c) we measure it
30. 30.True or false: a mirror is needed for the coloured flower experiment. (a) True (b) False
31. 31.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the flower floats away (c) the petals turn bluish (d) the water turns green
32. 32.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.🔍 Which is the odd one out? (a) a strip of cloth (b) a cotton thread (c) a paper towel (d) a plastic ruler
35. 35.🔍 Which is the odd one out? (a) a steel spoon (b) a piece of chalk (c) a glass marble (d) a rubber eraser
36. 36.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
37. 37.💧 Which of these does not let water climb? (a) a paper towel (b) a cotton thread (c) a glass marble (d) a piece of chalk
38. 38.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
39. 39.True or false: a paper towel does not let water climb. (a) True (b) False
40. 40.🛟 What should you do after handling food colour? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) wipe them on walls

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