Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 833 · 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 of these is needed for the float-or-sink test? (a) a balloon (b) turmeric powder (c) yeast (d) a results table
2. 2.🧺 Do we need a battery cell for the density tower? (a) not needed (b) needed
3. 3.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
4. 4.🛟 How should you check if the sugar has dissolved? (a) poke it with a finger (b) smell it closely (c) taste it (d) look for leftover grains
5. 5.🚀 Which of these goes backward? (a) the swimmer (b) the rowing boat (c) gas from the rocket (d) the balloon
6. 6.📘 What is the push of air on a falling thing called? (a) floating (b) magnetism (c) air resistance (d) dissolving
7. 7.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is what we measure. (a) True (b) False
8. 8.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a mirror (c) a results table (d) a tub of water
9. 9.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cotton wool (b) sugar (c) a teaspoon (d) warm water
10. 10.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
11. 11.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a drinking straw (c) a mirror (d) a balloon
12. 12.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil makes it rain (c) oil turns into honey (d) oil attracts magnets
13. 13.🍯 Why does honey sink to the bottom of the glass? (a) it is the stickiest (b) it is the coldest (c) it is yellow (d) it is the densest
14. 14.🧺 Do we need a magnet for the density tower? (a) needed (b) not needed
15. 15.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.🛟 What should you do after handling food colour? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) wipe them on walls
17. 17.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a sunny window (c) a battery cell (d) a mirror
18. 18.🧺 Do we need a mirror for the balloon rocket? (a) needed (b) not needed
19. 19.🧊 Why does an ice cube float on water? (a) water is sticky (b) ice is less dense (c) ice is very cold (d) ice is magnetic
20. 20.🛟 Which of these floats on water? (a) a glass marble (b) an ice-cream stick (c) a steel spoon (d) a pebble
21. 21.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) whether it floats (c) the kind of clay
22. 22.True or false: a piece of chalk lets water climb up it. (a) True (b) False
23. 23.🍯 Is a cork denser or less dense than water? (a) less dense than water (b) denser than water
24. 24.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) less friction (c) it goes faster (d) more friction, less far
25. 25.💧 What happens to water vapour when it touches the cold cling film? (a) it disappears (b) it turns to drops (c) it turns to smoke (d) it turns to salt
26. 26.🥄 Why does sugar dissolve faster in warm water? (a) sugar likes the dark (b) warm water is thicker (c) cold water is wet (d) particles move faster
27. 27.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
29. 29.🛟 Which of these sinks in water? (a) an ice-cream stick (b) a steel spoon (c) a feather (d) an empty capped bottle
30. 30.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) water with food colour (c) a magnet (d) a spoon
32. 32.True or false: a cork sinks in water. (a) True (b) False
33. 33.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.🍯 Is an ice cube denser or less dense than water? (a) less dense than water (b) denser than water
35. 35.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
36. 36.🧺 Do we need a clock or timer for the dissolving test? (a) needed (b) not needed
37. 37.True or false: table salt does not dissolve in water. (a) False (b) True
38. 38.True or false: a magnet is needed for the float-or-sink test. (a) True (b) False
39. 39.⚖️ 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
40. 40.🛟 Which is a safe rule for the balloon rocket? (a) aim it at your friend (b) blow it till it bursts (c) put string round a neck (d) keep it away from faces

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