Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 450 · 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.🚀 Which of these goes forward? (a) water from the oars (b) water a swimmer pushes (c) air from the balloon (d) the rocket
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.🔍 Which is the odd one out? (a) dew on morning grass (b) drops on a cold glass (c) a misty bathroom mirror (d) making ice lollies
4. 4.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) blow it till it bursts (c) put string round a neck (d) aim it at your friend
5. 5.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it sank as sand (b) it became air (c) it spread in the water (d) it vanished for ever
6. 6.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
7. 7.True or false: a pebble is less dense than water. (a) True (b) False
8. 8.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it through glass (c) look at it in a mirror (d) stare at the Sun
9. 9.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it does not fall (c) so it turns blue (d) so it gets hot
10. 10.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) a clock or timer (c) a balloon (d) cold water
11. 11.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) vinegar (b) a balloon (c) a drinking straw (d) a long string
12. 12.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) yeast (c) a small cup (d) sunlight
13. 13.True or false: a suction hook works by air pressure. (a) False (b) True
14. 14.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it dissolves (b) it turns to stone (c) it can float (d) it sinks faster
15. 15.🥄 Does sugar in icy water dissolve faster or slower? (a) faster (b) slower
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.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a stiff postcard (d) yeast
18. 18.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) yeast (c) a balloon (d) a magnet
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) a glass of water (d) a magnet
21. 21.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
22. 22.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is kept the same. (a) True (b) False
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same tape (b) distance it travels (c) how big we blow it (d) the slope of the string
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a sink or a bucket (c) yeast (d) a mirror
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) the same straw (b) how big we blow it (c) distance it travels
27. 27.🧺 Do we need a balloon for the balloon rocket? (a) needed (b) not needed
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is what we measure. (a) True (b) False
29. 29.🧊 Why does an ice cube float on water? (a) ice is very cold (b) ice is less dense (c) ice is magnetic (d) water is sticky
30. 30.🛟 How should you check if the sugar has dissolved? (a) taste it (b) smell it closely (c) poke it with a finger (d) look for leftover grains
31. 31.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
32. 32.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a balloon (c) a spoon (d) honey
33. 33.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) magnets (c) prisms (d) clouds
34. 34.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) yeast (d) a sunny window
35. 35.True or false: a paper towel does not let water climb. (a) False (b) True
36. 36.🧺 Do we need water with food colour for the density tower? (a) not needed (b) needed
37. 37.🧺 Do we need sugar for the dissolving test? (a) needed (b) not needed
38. 38.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) how many drops form (b) the time we wait (c) the amount of water (d) the cling film cover
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🧺 Do we need turmeric powder for the water cycle bowl? (a) needed (b) not needed

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