Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 499 · 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: food colour is needed for the coloured flower experiment. (a) True (b) False
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.🛟 What should you do after handling food colour? (a) lick your fingers (b) wipe them on walls (c) rub your eyes (d) wash your hands
4. 4.🔍 Which is the odd one out? (a) a piece of chalk (b) a steel spoon (c) a piece of foil (d) a plastic ruler
5. 5.🔮 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 stay white (d) they turn two colours
6. 6.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a mirror (b) a white flower (c) food colour (d) a few hours of waiting
7. 7.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) food colour (c) a magnet (d) a battery cell
8. 8.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a balloon (c) a white flower (d) a mirror
9. 9.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) the stem is hot (c) petals like colour (d) petals are magnetic
10. 10.⚖️ 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 measure it (c) we change it
11. 11.💧 Which of these does not let water climb? (a) a paper towel (b) a glass marble (c) a flower stem (d) a strip of cloth
12. 12.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
13. 13.💧 Which of these does not let water climb? (a) a paper towel (b) a flower stem (c) a rubber eraser (d) a cotton thread
14. 14.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
15. 15.True or false: a sugar cube does not let water climb. (a) False (b) True
16. 16.⚖️ 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 kind of flower (b) the amount of colour (c) time for colour to show (d) the room it stands in
17. 17.True or false: a mirror is needed for the coloured flower experiment. (a) False (b) True
18. 18.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
19. 19.🔍 Which is the odd one out? (a) a sugar cube (b) a glass marble (c) a cotton thread (d) a strip of cloth
20. 20.💧 Which of these lets water climb up it? (a) a cotton thread (b) a plastic ruler (c) a rubber eraser (d) a glass marble
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 kept the same. (a) False (b) True
22. 22.⚖️ 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) False (b) True
23. 23.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
24. 24.🔮 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
25. 25.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
26. 26.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a paper towel (c) a plastic ruler (d) a steel spoon
27. 27.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through the air (c) it rains on them (d) through tiny stem tubes
28. 28.🛟 Who should trim the flower stem? (a) a grown-up (b) a pet (c) anyone, without looking (d) a toddler
29. 29.🧺 Which of these is not needed for the coloured flower experiment? (a) a balloon (b) food colour (c) a glass of water (d) a white flower
30. 30.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the stem turns to ice (d) the water turns green
31. 31.💧 Which of these lets water climb up it? (a) a piece of foil (b) a glass marble (c) a steel spoon (d) a strip of cloth
32. 32.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
33. 33.🔍 Which is the odd one out? (a) a steel spoon (b) a plastic ruler (c) a glass marble (d) a sugar cube
34. 34.🧺 Which of these is not needed for the coloured flower experiment? (a) a magnet (b) food colour (c) a glass of water (d) a white flower
35. 35.💧 Which of these does not let water climb? (a) a paper towel (b) a piece of chalk (c) a flower stem (d) a piece of foil
36. 36.⚖️ 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 colour (b) the length of the stem (c) the kind of flower (d) the room it stands in
37. 37.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
38. 38.⚖️ 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
39. 39.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) True (b) False
40. 40.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) capillary action (d) evaporation

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