Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 426 · 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: the kind of flower is what we measure. (a) False (b) True
2. 2.⚖️ 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) False (b) True
3. 3.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic ruler (c) a steel spoon (d) a sugar cube
4. 4.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a glass of water (c) yeast (d) a white flower
5. 5.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) a few hours of waiting (c) a white flower (d) a glass of water
6. 6.True or false: a plastic ruler lets water climb up it. (a) False (b) True
7. 7.🌼 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
8. 8.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a few hours of waiting (c) food colour (d) a battery cell
9. 9.🔍 Which is the odd one out? (a) a piece of foil (b) a paper towel (c) a cotton thread (d) a strip of cloth
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) True (b) False
11. 11.⚖️ 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
12. 12.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the stem turns blue (d) the flower glows
13. 13.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
14. 14.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
15. 15.True or false: a balloon is not needed for the coloured flower experiment. (a) True (b) False
16. 16.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a battery cell (c) a white flower (d) a glass of water
18. 18.💧 Which of these lets water climb up it? (a) a strip of cloth (b) a glass marble (c) a steel spoon (d) a rubber eraser
19. 19.🔍 Which is the odd one out? (a) a glass marble (b) a piece of chalk (c) a steel spoon (d) a plastic ruler
20. 20.⚖️ 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 amount of colour (b) time for colour to show (c) the room it stands in (d) the length of the stem
21. 21.🔮 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
22. 22.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) magnetism (c) capillary action (d) melting
23. 23.True or false: a flower stem does not let water climb. (a) False (b) True
24. 24.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
25. 25.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a grown-up (c) a pet (d) a toddler
26. 26.⚖️ 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 kind of flower (b) the amount of colour (c) the length of the stem (d) time for colour to show
27. 27.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
28. 28.💧 Which of these does not let water climb? (a) a flower stem (b) a plastic ruler (c) a paper towel (d) a strip of cloth
29. 29.⚖️ 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) time for colour to show (c) the amount of water
30. 30.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) turmeric powder (c) a white flower (d) a mirror
32. 32.True or false: a flower stem lets water climb up it. (a) True (b) False
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 change it (c) we keep it the same
34. 34.🔍 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
35. 35.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they fall off at once (b) they all turn green (c) they turn two colours (d) they stay white
36. 36.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
37. 37.🛟 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
38. 38.True or false: a magnet is not needed for the coloured flower experiment. (a) True (b) False
39. 39.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) False (b) True
40. 40.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) the stem is hot (c) petals are magnetic (d) petals like colour

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