Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 46 · 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? Which of these is what we measure? (a) time for colour to show (b) the amount of water (c) the amount of colour (d) the length of the stem
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.True or false: a magnet is needed for the coloured flower experiment. (a) False (b) True
4. 4.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
5. 5.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the stem turns to ice (c) the flower floats away (d) the petals turn bluish
6. 6.True or false: a plastic ruler does not let water climb. (a) False (b) True
7. 7.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
8. 8.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) food colour (c) a magnet (d) a balloon
10. 10.🔍 Which is the odd one out? (a) a plastic ruler (b) a strip of cloth (c) a glass marble (d) a steel spoon
11. 11.🔍 Which is the odd one out? (a) a glass marble (b) a paper towel (c) a piece of foil (d) a steel spoon
12. 12.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a mirror (c) a white flower (d) a glass of water
13. 13.True or false: a rubber eraser does not let water climb. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) a piece of chalk (b) a cotton thread (c) a sugar cube (d) a piece of foil
15. 15.🔮 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
16. 16.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber eraser (c) a sugar cube (d) a piece of foil
17. 17.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals lose water to air (c) petals are magnetic (d) petals like colour
18. 18.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a mirror (c) a balloon (d) a magnet
19. 19.🛟 What should you do after handling food colour? (a) wipe them on walls (b) rub your eyes (c) wash your hands (d) lick your fingers
20. 20.⚖️ 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 amount of colour (c) time for colour to show
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.🧺 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
24. 24.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic ruler (c) a steel spoon (d) a glass marble
25. 25.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it turns to plastic (c) nothing ever happens (d) it sinks at once
26. 26.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a cotton thread (b) a piece of chalk (c) a paper towel (d) a plastic ruler
28. 28.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
29. 29.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
30. 30.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
31. 31.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) no colour change (d) the petals turn red
32. 32.🌼 How does coloured water reach the petals? (a) it rains on them (b) through tiny stem tubes (c) through the air (d) it is sprayed on
33. 33.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a battery cell (c) food colour (d) a few hours of waiting
34. 34.🔍 Which is the odd one out? (a) a steel spoon (b) a flower stem (c) a strip of cloth (d) a cotton thread
35. 35.💧 Which of these does not let water climb? (a) a plastic ruler (b) a paper towel (c) a flower stem (d) a piece of chalk
36. 36.⚖️ 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 kept the same. (a) False (b) True
37. 37.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
38. 38.True or false: a glass of water is needed for the coloured flower experiment. (a) True (b) False
39. 39.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
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 the one thing we change. (a) True (b) False

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