Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 494 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — density, dissolving, capillary action, light bending, air pressure, push-back, air resistance or condensation. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they mix for ever (b) they turn to honey (c) they become solid (d) they separate again
2. 2.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) a magnet (c) vinegar (d) two chairs
3. 3.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) forward (c) it stays still (d) backward
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 fall off at once (b) they all turn green (c) they turn two colours (d) they stay white
6. 6.True or false: a mirror is needed for the coloured flower experiment. (a) False (b) True
7. 7.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) over a laptop (d) on a bed
8. 8.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the slope of the string (b) distance it travels (c) the same tape (d) how big we blow it
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the water layer (c) in the honey layer (d) on top of the oil
11. 11.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the flat sheet (b) the crumpled ball (c) a sheet of glass (d) neither of them
12. 12.🔍 Which layer is on top in the honey-water-oil tower? (a) honey (b) coloured water (c) the spoon (d) cooking oil
13. 13.🧺 Which of these is not needed for the density tower? (a) a spoon (b) water with food colour (c) a battery cell (d) cooking oil
14. 14.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
15. 15.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same string (b) how big we blow it (c) the same tape (d) distance it travels
16. 16.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
17. 17.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) small test objects (c) a tub of water (d) a magnet
18. 18.🧺 Do we need ice cubes for the water cycle bowl? (a) not needed (b) needed
19. 19.🥄 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.True or false: ice cubes is not needed for the water cycle bowl. (a) False (b) True
21. 21.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a fridge magnet (b) a mirror (c) a balloon rocket (d) a sundial
22. 22.🔍 Which is the odd one out? (a) a pebble (b) a steel spoon (c) a coin (d) an ice-cream stick
23. 23.🛟 Does a ping-pong ball float or sink in water? (a) floats (b) sinks
24. 24.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) turmeric powder (b) sunlight (c) a big bowl (d) ice cubes
25. 25.🔍 Which is the odd one out? (a) a cork (b) an ice-cream stick (c) a ball of clay (d) a piece of thermocol
26. 26.True or false: a magnet is not needed for the paper helicopter. (a) True (b) False
27. 27.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.⚖️ 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) False (b) True
29. 29.🛟 What should you do with popped balloon pieces? (a) keep them in your mouth (b) throw them away safely (c) give them to a baby (d) chew them
30. 30.🔮 Predict: you fold the two blades the other way. What changes? (a) it does not fall (b) it falls upward (c) it turns blue (d) it spins the other way
31. 31.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🧺 Do we need a mirror for the paper helicopter? (a) not needed (b) needed
33. 33.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a stiff postcard (c) a towel (d) a sink or a bucket
35. 35.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) it changes colour (c) hot water is magnetic (d) hot water is heavy
36. 36.True or false: a balloon is not needed for the density tower. (a) False (b) True
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a balloon (d) a mirror
38. 38.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the kind of paper (b) the drop height (c) time to reach the floor (d) the person dropping
39. 39.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the shape of the clay (b) the amount of clay (c) whether it floats (d) the kind of clay
40. 40.True or false: a magnet is not needed for the water cycle bowl. (a) False (b) True

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