Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 432 · 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 is a safe rule for the balloon rocket? (a) aim it at your friend (b) put string round a neck (c) blow it till it bursts (d) keep it away from faces
2. 2.True or false: a tub of water is needed for the float-or-sink test. (a) True (b) False
3. 3.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
4. 4.🛟 Who should pour the warm water in the dissolving test? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
5. 5.True or false: water becoming ice is melting. (a) False (b) True
6. 6.🧺 Do we need a drinking straw for the balloon rocket? (a) needed (b) not needed
7. 7.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) glucose powder (d) chalk powder
8. 8.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) sunlight (c) a mirror (d) a small cup
9. 9.⚖️ 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 keep it the same (b) we measure it (c) we change it
10. 10.🧺 Do we need a balloon for the balloon rocket? (a) needed (b) not needed
11. 11.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they separate again (c) they turn to honey (d) they mix for ever
12. 12.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a magnet (b) a tub of water (c) a results table (d) small test objects
13. 13.True or false: sugar stirred well dissolves slower. (a) True (b) False
14. 14.🧺 Which of these is needed for the dissolving test? (a) two clear glasses (b) honey (c) a mirror (d) a comb
15. 15.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to smoke (b) it turns to drops (c) it disappears (d) it turns to salt
16. 16.🧺 Which of these is not needed for the dissolving test? (a) a magnet (b) cold water (c) a teaspoon (d) a clock or timer
17. 17.🔍 Which is the odd one out? (a) air (b) an ice cube (c) a ping-pong ball (d) a glass marble
18. 18.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is sticky (c) oil is hot (d) oil is less dense
19. 19.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the water turns solid (b) some stays undissolved (c) all of it dissolves (d) the sugar turns to salt
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is what we measure. (a) False (b) True
21. 21.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a strip of paper (c) a paper clip (d) a battery cell
22. 22.True or false: a ball of clay sinks in water. (a) True (b) False
23. 23.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.⚖️ 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) time for colour to show (c) the length of the stem (d) the room it stands in
25. 25.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) the sugar cube (c) powdered sugar (d) neither of them
26. 26.⚖️ 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 tub of water (b) the shape of the clay (c) the amount of clay (d) whether it floats
27. 27.🧊 Why does an ice cube float on water? (a) water is sticky (b) ice is less dense (c) ice is magnetic (d) ice is very cold
28. 28.True or false: a paper towel does not let water climb. (a) False (b) True
29. 29.🥄 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a comb (b) a clock or timer (c) cold water (d) two clear glasses
31. 31.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the honey layer (c) in the water layer (d) on top of the oil
32. 32.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
33. 33.🥄 Which of these dissolves faster? (a) sugar in warm water (b) a big sugar cube (c) sugar left unstirred (d) sugar in icy water
34. 34.True or false: a paper towel lets water climb up it. (a) True (b) False
35. 35.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a long string (c) a drinking straw (d) a magnet
36. 36.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) run around the tub (c) leave water on the floor (d) wipe up spills at once
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.🧺 Do we need a pencil for the paper helicopter? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for the float-or-sink test? (a) a mirror (b) small test objects (c) a magnet (d) a balloon
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) how many drops form (c) the cling film cover

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