Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 851 · 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.True or false: a fridge magnet works by magnetism. (a) True (b) False
2. 2.🧺 Which of these is not needed for the density tower? (a) a balloon (b) a spoon (c) water with food colour (d) honey
3. 3.💧 In the covered bowl, where does the water vapour come from? (a) the cling film (b) the air outside (c) water warmed by the Sun (d) the bowl itself
4. 4.🛟 Which of these floats on water? (a) a glass marble (b) an ice cube (c) an iron nail (d) a pebble
5. 5.True or false: an ice cube is denser than water. (a) True (b) False
6. 6.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) the straw is heavy (c) a magnet pulls it (d) escaping air pushes it
7. 7.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same glass (b) whether the card stays (c) the same card (d) how full the glass is
8. 8.True or false: cooking oil is less dense than water. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is kept the same. (a) True (b) False
11. 11.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is sticky (d) oil is hot
12. 12.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
13. 13.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) a balloon (c) a long string (d) a magnet
14. 14.🥚 A fresh egg sinks in plain water. What makes it float? (a) a few ice cubes (b) lots of salt stirred in (c) a little shaking (d) more plain water
15. 15.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
16. 16.🛟 Which of these sinks in water? (a) a piece of thermocol (b) an iron nail (c) a cork (d) an ice-cream stick
17. 17.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) colour climbs up it (c) it sinks at once (d) it turns to plastic
18. 18.🧺 Do we need vinegar for the balloon rocket? (a) not needed (b) needed
19. 19.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) red (c) blue (d) violet
20. 20.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) violet (c) orange (d) yellow
21. 21.🧺 Do we need a balloon for the balloon rocket? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for the dissolving test? (a) honey (b) a comb (c) a balloon (d) warm water
23. 23.🚀 Which of these goes forward? (a) the rocket (b) water a swimmer pushes (c) water from the oars (d) air from the balloon
24. 24.🧺 Which of these is not needed for the balloon rocket? (a) a balloon (b) two chairs (c) a long string (d) a battery cell
25. 25.🌈 How many colours do we name in a rainbow (VIBGYOR)?
26. 26.⚖️ 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 card (b) the way we turn it (c) whether the card stays (d) how full the glass is
27. 27.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a battery cell (c) small test objects (d) a results table
28. 28.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a magnet (b) a big bowl (c) sunlight (d) a small cup
29. 29.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) how big we blow it (b) the same straw (c) distance it travels
30. 30.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed
31. 31.🧺 Do we need a results table for the float-or-sink test? (a) not needed (b) needed
32. 32.🔍 Which is the odd one out? (a) food colour (b) sugar (c) sand (d) glucose powder
33. 33.🧺 Which of these is needed for the water rainbow? (a) a sunny window (b) a balloon (c) a magnet (d) a mirror
34. 34.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True
35. 35.🍯 Which of these is less dense than water? (a) a cork (b) a pebble (c) honey (d) very salty water
36. 36.🛟 What should you do with wet floors after the experiment? (a) pour more water (b) slide on them (c) leave them wet (d) wipe them dry
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is the one thing we change. (a) False (b) True
38. 38.True or false: a flower stem lets water climb up it. (a) True (b) False
39. 39.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) False (b) True
40. 40.🧺 Which of these is not needed for the water cycle bowl? (a) a small cup (b) ice cubes (c) sunlight (d) turmeric powder

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