Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 576 · 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 colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the kind of flower
2. 2.🚁 Which of these falls fast through the air? (a) a fluff of cotton (b) a toy parachute (c) a glass marble (d) an open sheet of paper
3. 3.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a clock or timer (c) sugar (d) cotton wool
5. 5.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) magnetism (c) reflection (d) refraction
6. 6.🧺 Which of these is needed for the dissolving test? (a) a balloon (b) a mirror (c) a clock or timer (d) a magnet
7. 7.True or false: a battery cell is needed for the float-or-sink test. (a) False (b) True
8. 8.💧 Which of these lets water climb up it? (a) a steel spoon (b) a glass marble (c) a piece of foil (d) a sugar cube
9. 9.True or false: a suction hook works by air pressure. (a) True (b) False
10. 10.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) glue on the card (d) a magnet
11. 11.🍯 Is a coin denser or less dense than water? (a) denser than water (b) less dense than water
12. 12.True or false: yeast is needed for the water rainbow. (a) False (b) True
13. 13.🧺 Do we need cooking oil for the density tower? (a) needed (b) not needed
14. 14.True or false: gas from the rocket goes backward. (a) True (b) False
15. 15.🧺 Do we need yeast for the water cycle bowl? (a) needed (b) not needed
16. 16.🛟 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
17. 17.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is what we measure. (a) False (b) True
18. 18.True or false: a balloon is needed for the float-or-sink test. (a) True (b) False
19. 19.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
20. 20.🌈 How many colours do we name in a rainbow (VIBGYOR)?
21. 21.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.True or false: yeast is needed for the paper helicopter. (a) True (b) False
23. 23.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of the layers”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) yeast (c) bright sunlight (d) a clear glass of water
25. 25.⚖️ 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 way we turn it (b) the same card (c) how full the glass is (d) the same glass
26. 26.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.True or false: air from the balloon goes backward. (a) True (b) False
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a towel (d) a stiff postcard
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) yeast (b) a white flower (c) a few hours of waiting (d) food colour
30. 30.True or false: a glass marble is less dense than water. (a) False (b) True
31. 31.💧 Which change is this: drops on a cold glass? (a) melting (b) freezing (c) condensation (d) evaporation
32. 32.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) wipe up spills at once (c) leave water on the floor (d) play near a deep pond
33. 33.🧺 Do we need a balloon for the balloon rocket? (a) needed (b) not needed
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the kind of sugar is kept the same. (a) False (b) True
35. 35.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.📘 What pulls the paper helicopter down to the floor? (a) gravity (b) air pressure (c) the wind (d) magnetism
37. 37.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a vacuum cleaner (d) a magnetic pin holder
38. 38.🧺 Do we need a pencil for the paper helicopter? (a) not needed (b) needed
39. 39.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
40. 40.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True

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