Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 303 · 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.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is heavier (c) oil is hot (d) oil is less dense
2. 2.True or false: a spoon is needed for the density tower. (a) True (b) False
3. 3.🔍 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
4. 4.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) aim it at your friend (c) blow it till it bursts (d) put string round a neck
5. 5.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
6. 6.🧺 Do we need small test objects for the float-or-sink test? (a) needed (b) not needed
7. 7.⚖️ 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) False (b) True
8. 8.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
9. 9.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) food colour (c) a battery cell (d) a few hours of waiting
10. 10.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) sun or shade (b) the size of the bowl (c) the time we wait (d) how many drops form
11. 11.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it melts (c) it turns blue (d) it sinks
12. 12.🥄 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
14. 14.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it turns blue (c) it does not fall (d) it spins the other way
15. 15.🧺 Do we need yeast for the float-or-sink test? (a) needed (b) not needed
16. 16.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is the one thing we change. (a) True (b) False
17. 17.True or false: a drinking straw is not needed for the balloon rocket. (a) True (b) False
18. 18.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same straw (b) how big we blow it (c) the same string (d) distance it travels
19. 19.🔍 Which is the odd one out? (a) a coin (b) air (c) an ice cube (d) a cork
20. 20.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
21. 21.True or false: yeast is not needed for the paper helicopter. (a) True (b) False
22. 22.True or false: a balloon is needed for the paper helicopter. (a) False (b) True
23. 23.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) how much of each liquid (c) the order of the layers (d) the same three liquids
24. 24.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is what we measure. (a) True (b) False
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a stiff postcard (d) a battery cell
26. 26.True or false: a magnet is not needed for the paper helicopter. (a) False (b) True
27. 27.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
28. 28.🎈 What is the job of the straw on the string? (a) it holds water (b) it blows air in (c) it makes it heavier (d) it guides the balloon
29. 29.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is what we measure. (a) False (b) True
31. 31.True or false: a puddle drying up is freezing. (a) True (b) False
32. 32.🧺 Which of these is needed for the water cycle bowl? (a) a balloon (b) sunlight (c) a magnet (d) turmeric powder
33. 33.True or false: a compass needle works by magnetism. (a) False (b) True
34. 34.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
35. 35.🔮 Predict: you blow the balloon up only a little. What happens? (a) it flies off the string (b) it goes less far (c) it goes much farther (d) it turns into a kite
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is the one thing we change. (a) True (b) False
38. 38.🧺 Which of these is needed for the dissolving test? (a) cotton wool (b) a mirror (c) a magnet (d) a clock or timer
39. 39.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) sunlight (c) a balloon (d) ice cubes
40. 40.🛟 Which of these sinks in water? (a) an ice-cream stick (b) a piece of thermocol (c) a dry leaf (d) an iron nail

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