Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 190 · 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.🥚 A fresh egg sinks in plain water. What makes it float? (a) more plain water (b) a few ice cubes (c) lots of salt stirred in (d) a little shaking
2. 2.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is sticky (c) oil is less dense (d) oil is hot
3. 3.🚁 What does the paper helicopter do as it falls? (a) it flies upward (b) it stays still in air (c) it turns into a ball (d) it spins round
4. 4.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a compass needle (c) a drinking straw (d) a vacuum cleaner
5. 5.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
6. 6.True or false: wet hair drying is evaporation. (a) False (b) True
7. 7.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.🧺 Do we need a balloon for the paper helicopter? (a) needed (b) not needed
9. 9.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
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 order of the layers is kept the same. (a) False (b) True
11. 11.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) cooking oil (c) a spoon (d) a balloon
12. 12.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil turns into honey (c) oil attracts magnets (d) spilled oil is slippery
13. 13.🧺 Which of these is not needed for the density tower? (a) honey (b) cooking oil (c) a tall clear glass (d) yeast
14. 14.🥄 Why does sugar dissolve faster in warm water? (a) particles move faster (b) sugar likes the dark (c) warm water is thicker (d) cold water is wet
15. 15.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
16. 16.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.True or false: an iron nail floats on water. (a) True (b) False
18. 18.🧺 Which of these is needed for the water cycle bowl? (a) turmeric powder (b) a battery cell (c) cling film (d) a magnet
19. 19.True or false: a pond icing over is condensation. (a) True (b) False
20. 20.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) small test objects (c) a balloon (d) a results table
21. 21.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a bicycle pump (d) a compass needle
23. 23.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of water (b) the kind of sugar (c) the amount of sugar (d) the water temperature
24. 24.🔍 You drop a coin into a tub of water. What do you see? (a) it bounces up (b) it sinks (c) it dissolves (d) it floats
25. 25.🔍 Sand is stirred into water. What do you see after a while? (a) it dissolves (b) it turns blue (c) it settles at the bottom (d) it floats up
26. 26.🔍 Which layer is on top in the honey-water-oil tower? (a) coloured water (b) the spoon (c) cooking oil (d) honey
27. 27.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a drinking straw (d) a magnetic chess set
28. 28.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the water is coloured (c) water splits the light (d) the glass is painted
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a battery cell (c) a stiff postcard (d) a towel
30. 30.🧊 Why does an ice cube float on water? (a) ice is less dense (b) ice is very cold (c) water is sticky (d) ice is magnetic
31. 31.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes backward (b) goes forward
32. 32.🚁 Which of these falls fast through the air? (a) a fluff of cotton (b) a glass marble (c) a paper helicopter (d) a feather
33. 33.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) wipe them dry (c) leave them wet (d) pour more water
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the amount of water (b) brightness of rainbow (c) the time of day (d) the same glass
35. 35.⚖️ 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 kind of clay (b) the amount of clay (c) the tub of water (d) the shape of the clay
36. 36.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
38. 38.🚁 Why does the paper helicopter fall slowly? (a) it has no weight (b) a magnet holds it (c) air pushes on its blades (d) the floor pushes it
39. 39.⚖️ 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) the size of the bowl (b) the amount of water (c) how many drops form (d) sun or shade
40. 40.True or false: a paper helicopter falls fast through the air. (a) True (b) False

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