Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 164 · 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 the odd one out? (a) drops on a cold glass (b) a puddle drying up (c) a misty bathroom mirror (d) drops under a pot lid
2. 2.🚀 Which of these goes forward? (a) gas from the rocket (b) air from the balloon (c) water from the oars (d) the rowing boat
3. 3.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) at the very bottom (c) in the water layer (d) in the oil layer
4. 4.🧺 Which of these is not needed for the water cycle bowl? (a) cling film (b) turmeric powder (c) ice cubes (d) a big bowl
5. 5.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
6. 6.⚖️ 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 kept the same. (a) True (b) False
7. 7.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
8. 8.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a balloon (c) a mirror (d) two chairs
9. 9.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) spilled oil is slippery (d) oil attracts magnets
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) distance it travels (b) how big we blow it (c) the same tape (d) the same string
11. 11.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to splash everyone (c) to keep children safe (d) to hide the corks
12. 12.🛟 Does a ball of clay float or sink in water? (a) floats (b) sinks
13. 13.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) in the honey layer (c) under the honey (d) on top of the oil
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) True (b) False
15. 15.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
16. 16.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) a balloon (c) two chairs (d) vinegar
17. 17.🥄 Which of these does not dissolve in water? (a) food colour (b) sawdust (c) table salt (d) sugar
18. 18.True or false: a magnet is needed for the balloon rocket. (a) True (b) False
19. 19.⚖️ 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 kind of paper (c) the length of the blades (d) time to reach the floor
20. 20.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) both the same (c) neither of them (d) powdered sugar
21. 21.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🔍 What do you see after pouring honey, water and oil into one glass? (a) three separate layers (b) the glass gets hot (c) one mixed colour (d) bubbles of gas
23. 23.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is what we measure. (a) True (b) False
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a mirror (c) a sink or a bucket (d) a battery cell
25. 25.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) the straw is hot (d) juice likes plastic
26. 26.🚁 What does the paper helicopter do as it falls? (a) it stays still in air (b) it turns into a ball (c) it spins round (d) it flies upward
27. 27.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) True (b) False
28. 28.🥄 Which of these dissolves faster? (a) sugar in icy water (b) sugar left unstirred (c) a big sugar cube (d) sugar stirred well
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a few hours of waiting (c) turmeric powder (d) food colour
30. 30.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
31. 31.🔍 Which is the odd one out? (a) honey (b) air (c) a ping-pong ball (d) a cork
32. 32.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals lose water to air (c) petals like colour (d) the stem is hot
33. 33.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the amount of water (b) time to dissolve (c) the water temperature
34. 34.🧊 Why does an ice cube float on water? (a) water is sticky (b) ice is magnetic (c) ice is less dense (d) ice is very cold
35. 35.🛟 What should you do after handling food colour? (a) lick your fingers (b) wash your hands (c) wipe them on walls (d) rub your eyes
36. 36.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they mix for ever (c) they turn to honey (d) they separate again
37. 37.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
38. 38.🚁 Which of these falls slowly through the air? (a) an open sheet of paper (b) a coin (c) a crumpled paper ball (d) a steel spoon
39. 39.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is less dense (c) oil is heavier (d) oil is hot
40. 40.True or false: a balloon is not needed for the dissolving test. (a) False (b) True

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