Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 9 · 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 — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same glass is the one thing we change. (a) True (b) False
2. 2.🧺 Do we need cold water for the dissolving test? (a) not needed (b) needed
3. 3.🧺 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) small test objects (d) a towel for spills
4. 4.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) through the air (c) it is sprayed on (d) it rains on them
5. 5.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) it has a magnet (c) its hollow shape (d) sea water is warm
6. 6.True or false: a dry leaf floats on water. (a) True (b) False
7. 7.⚖️ 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
8. 8.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
9. 9.🧺 Which of these is needed for the water cycle bowl? (a) a battery cell (b) yeast (c) a magnet (d) cling film
10. 10.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a vacuum cleaner
11. 11.🧺 Which of these is needed for the balloon rocket? (a) a magnet (b) a battery cell (c) yeast (d) a balloon
12. 12.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they turn to honey (c) they separate again (d) they mix for ever
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) brightness of rainbow (c) the same glass
14. 14.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) hot water is magnetic (c) hot water is heavy (d) it changes colour
15. 15.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) how big we blow it (c) the same string
16. 16.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) small test objects (c) a balloon (d) a results table
17. 17.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a few hours of waiting (c) a white flower (d) a mirror
19. 19.🥄 Why does sugar dissolve faster in warm water? (a) sugar likes the dark (b) cold water is wet (c) particles move faster (d) warm water is thicker
20. 20.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a steel spoon (b) a stone (c) a coin (d) a fluff of cotton
22. 22.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) a mirror (c) water (d) a small cup
23. 23.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a balloon (c) a tall clear glass (d) a spoon
25. 25.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
26. 26.💧 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
27. 27.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a towel for spills (c) yeast (d) a results table
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a battery cell (c) a towel (d) a glass of water
30. 30.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a bicycle pump (d) a magnetic pin holder
31. 31.True or false: a big sugar cube dissolves faster. (a) True (b) False
32. 32.⚖️ 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 same glass”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🔍 Which is the odd one out? (a) a suction hook (b) a compass needle (c) a magnetic pin holder (d) a magnetic chess set
34. 34.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it can pop loudly (c) it changes colour (d) it gets too heavy
35. 35.🧺 Do we need yeast for the paper helicopter? (a) needed (b) not needed
36. 36.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
37. 37.🔍 Which is the odd one out? (a) snow turning to water (b) butter going runny (c) drops under a pot lid (d) ice becoming water
38. 38.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) snow falling (c) a small rainbow (d) a shadow of ice
39. 39.True or false: sugar in icy water dissolves faster. (a) True (b) False
40. 40.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the paper clip (b) the drop height (c) the length of the blades (d) time to reach the floor

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