Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 24 · 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.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) True (b) False
2. 2.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is the one thing we change. (a) True (b) False
3. 3.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it gets hot (d) so it does not fall
4. 4.🧺 Which of these is not needed for the density tower? (a) a spoon (b) water with food colour (c) a balloon (d) a tall clear glass
5. 5.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the glass breaks (d) the card stays on
6. 6.True or false: a steel spoon does not let water climb. (a) False (b) True
7. 7.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a clear glass of water (c) bright sunlight (d) a sunny window
8. 8.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
9. 9.🎈 Why does the balloon rocket move along the string? (a) the straw is heavy (b) escaping air pushes it (c) a magnet pulls it (d) the string pulls it
10. 10.🔍 Which is the odd one out? (a) drops on a cold glass (b) a misty bathroom mirror (c) dew on morning grass (d) butter going runny
11. 11.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) clouds (c) balloons (d) prisms
12. 12.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the way we turn it (b) the same card (c) how full the glass is (d) the same glass
13. 13.🚁 Dropped from a raised hand, does a glass marble fall slowly or fast? (a) falls slowly (b) falls fast
14. 14.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
16. 16.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) slide on them (c) wipe them dry (d) pour more water
17. 17.🛟 Does an ice-cream stick float or sink in water? (a) sinks (b) floats
18. 18.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) more plain water (c) lots of salt stirred in (d) a few ice cubes
19. 19.🚀 Which of these goes backward? (a) the rocket (b) the balloon (c) gas from the rocket (d) the rowing boat
20. 20.True or false: a clear glass of water is needed for the water rainbow. (a) True (b) False
21. 21.🔮 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) neither of them (d) a sheet of glass
22. 22.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a results table (c) a mirror (d) small test objects
23. 23.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a mirror (b) a glass of water (c) a few hours of waiting (d) a white flower
24. 24.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of pouring”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) False (b) True
26. 26.🧺 Do we need a mirror for the float-or-sink test? (a) needed (b) not needed
27. 27.🛟 What should you do with popped balloon pieces? (a) give them to a baby (b) throw them away safely (c) keep them in your mouth (d) chew them
28. 28.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.🍯 Which of these is denser than water? (a) an ice cube (b) a cork (c) very salty water (d) a ping-pong ball
30. 30.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) water (c) cling film (d) yeast
31. 31.🥄 Which of these dissolves faster? (a) sugar in icy water (b) powdered sugar (c) a big sugar cube (d) sugar left unstirred
32. 32.🧺 Do we need a battery cell for the water cycle bowl? (a) not needed (b) needed
33. 33.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same glass (b) the time of day (c) brightness of rainbow (d) the same window
34. 34.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
36. 36.🧺 Do we need sticky tape for the balloon rocket? (a) not needed (b) needed
37. 37.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) sugar (d) chalk powder
38. 38.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes backward (b) goes forward
39. 39.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) a big bowl (c) a balloon (d) sunlight
40. 40.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it

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