Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 47 · 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.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a balloon (b) a few hours of waiting (c) a glass of water (d) a white flower
2. 2.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
3. 3.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
4. 4.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a steel spoon (c) a flower stem (d) a piece of foil
5. 5.⚖️ 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
6. 6.True or false: a balloon is needed for the coloured flower experiment. (a) False (b) True
7. 7.🔮 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
8. 8.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) wipe them on walls
9. 9.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
10. 10.True or false: a sugar cube does not let water climb. (a) True (b) False
11. 11.True or false: a mirror is needed for the coloured flower experiment. (a) True (b) False
12. 12.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
13. 13.⚖️ 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 what we measure. (a) False (b) True
14. 14.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True
15. 15.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
16. 16.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a balloon (c) a few hours of waiting (d) a white flower
19. 19.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
20. 20.⚖️ 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 water (b) the length of the stem (c) time for colour to show (d) the amount of colour
21. 21.🧺 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) a battery cell (d) a glass of water
22. 22.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic ruler (c) a piece of chalk (d) a strip of cloth
24. 24.🔮 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 stay white (c) they all turn green (d) they turn two colours
25. 25.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a sugar cube (c) a steel spoon (d) a rubber eraser
26. 26.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a magnet (c) a battery cell (d) a white flower
27. 27.💧 Which of these does not let water climb? (a) a sugar cube (b) a flower stem (c) a strip of cloth (d) a plastic ruler
28. 28.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) melting (c) capillary action (d) magnetism
29. 29.⚖️ 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 measure it (b) we change it (c) we keep it the same
30. 30.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the water turns green (c) the petals turn bluish (d) the stem turns to ice
31. 31.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
32. 32.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
33. 33.🔍 Which is the odd one out? (a) a rubber eraser (b) a strip of cloth (c) a cotton thread (d) a paper towel
34. 34.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a battery cell (c) a balloon (d) a magnet
35. 35.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) True (b) False
36. 36.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
37. 37.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) anyone, without looking (d) a pet
38. 38.⚖️ 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 measure it (c) we keep it the same
39. 39.🔍 Which is the odd one out? (a) a cotton thread (b) a steel spoon (c) a paper towel (d) a flower stem
40. 40.True or false: a glass marble lets water climb up it. (a) False (b) True

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