Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 445 · 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.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a piece of foil (c) a glass marble (d) a piece of chalk
2. 2.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) a balloon (d) food colour
3. 3.🔍 Which is the odd one out? (a) a flower stem (b) a steel spoon (c) a cotton thread (d) a paper towel
4. 4.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a pet (c) a grown-up (d) a toddler
5. 5.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
6. 6.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) a mirror (c) a few hours of waiting (d) a balloon
7. 7.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
8. 8.🧺 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 mirror
9. 9.🔮 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 turn two colours (c) they fall off at once (d) they stay white
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) turmeric powder (c) a mirror (d) food colour
12. 12.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
13. 13.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
14. 14.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a mirror (c) a glass of water (d) a few hours of waiting
15. 15.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) evaporation (c) capillary action (d) melting
16. 16.True or false: a piece of chalk does not let water climb. (a) True (b) False
17. 17.True or false: a steel spoon lets water climb up it. (a) False (b) True
18. 18.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
19. 19.True or false: a rubber eraser does not let water climb. (a) False (b) True
20. 20.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
21. 21.💧 Which of these does not let water climb? (a) a strip of cloth (b) a flower stem (c) a plastic ruler (d) a sugar cube
22. 22.🛟 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
23. 23.⚖️ 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 keep it the same (b) we measure it (c) we change it
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a magnet (b) a white flower (c) a glass of water (d) food colour
26. 26.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) the stem turns blue (d) no colour change
27. 27.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) the stem is hot (c) petals like colour (d) petals lose water to air
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) time for colour to show (b) the kind of flower (c) the room it stands in (d) the length of the stem
29. 29.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) True (b) False
30. 30.🧺 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 battery cell
31. 31.🔍 Which is the odd one out? (a) a piece of foil (b) a plastic ruler (c) a steel spoon (d) a flower stem
32. 32.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
33. 33.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
34. 34.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a glass of water (c) a few hours of waiting (d) a magnet
35. 35.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) it is sprayed on (c) through the air (d) it rains on them
36. 36.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is what we measure. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a piece of chalk (b) a plastic ruler (c) a rubber eraser (d) a steel spoon
38. 38.⚖️ 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 length of the stem (b) the kind of flower (c) time for colour to show
39. 39.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) nothing ever happens (c) it sinks at once (d) colour climbs up it
40. 40.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True

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