Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 27 · 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? What do we do with “the tub of water”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) its hollow shape (c) sea water is warm (d) steel is very light
3. 3.True or false: a mirror is needed for the coloured flower experiment. (a) False (b) True
4. 4.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) sticky tape (c) two chairs (d) a battery cell
5. 5.🔍 Which is the odd one out? (a) a rubber eraser (b) a paper towel (c) a cotton thread (d) a strip of cloth
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (a) False (b) True
7. 7.🔮 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
8. 8.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it goes much farther (c) it flies off the string (d) it goes less far
9. 9.🔍 Which is the odd one out? (a) snow turning to water (b) butter going runny (c) ice becoming water (d) a misty bathroom mirror
10. 10.⚖️ 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 three liquids is what we measure. (a) False (b) True
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the kind of paper (b) the paper clip (c) the length of the blades (d) time to reach the floor
12. 12.🌈 In VIBGYOR, what number colour is indigo?
13. 13.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) powdered sugar (b) the sugar cube (c) neither of them (d) both the same
14. 14.🧺 Which of these is needed for the density tower? (a) a balloon (b) water with food colour (c) a mirror (d) turmeric powder
15. 15.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) a big bowl (c) sunlight (d) turmeric powder
16. 16.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) the water turns red (c) fewer drops form (d) more drops form
17. 17.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) petals lose water to air (c) the stem is hot (d) petals are magnetic
18. 18.🚀 Which of these goes forward? (a) water from the oars (b) the balloon (c) gas from the rocket (d) air from the balloon
19. 19.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of the layers (b) the order of pouring (c) the same glass
20. 20.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for the water cycle bowl? (a) a battery cell (b) a big bowl (c) a balloon (d) a mirror
22. 22.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) nothing ever happens (c) it sinks at once (d) colour climbs up it
23. 23.📘 What pulls the paper helicopter down to the floor? (a) the wind (b) magnetism (c) gravity (d) air pressure
24. 24.⚖️ 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 same glass (b) how full the glass is (c) the way we turn it (d) the same card
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) stare at the Sun (c) never look at the Sun (d) look at it through glass
26. 26.True or false: a drinking straw is not needed for the balloon rocket. (a) True (b) False
27. 27.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a bicycle pump (d) a fridge magnet
28. 28.True or false: a fridge magnet works by magnetism. (a) False (b) True
29. 29.🧺 Do we need a results table for the float-or-sink test? (a) needed (b) not needed
30. 30.🧺 Which of these is needed for the float-or-sink test? (a) a mirror (b) a results table (c) a magnet (d) a battery cell
31. 31.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) leave water on the floor (c) wipe up spills at once (d) run around the tub
32. 32.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) yeast
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a sink or a bucket (d) a glass of water
34. 34.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar in warm water (c) sugar in icy water (d) sugar stirred well
35. 35.🧺 Which of these is not needed for the balloon rocket? (a) sticky tape (b) a battery cell (c) a drinking straw (d) two chairs
36. 36.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
37. 37.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.True or false: yeast is not needed for the coloured flower experiment. (a) True (b) False
39. 39.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) from your raised hand (c) a high window ledge (d) a roof edge
40. 40.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the amount of colour (b) time for colour to show (c) the length of the stem

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