Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 174 · 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.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) it changes colour (c) hot water is heavy (d) hot water is magnetic
2. 2.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the room it stands in (b) the kind of flower (c) time for colour to show (d) the length of the stem
3. 3.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a clear glass of water (c) a battery cell (d) a magnet
4. 4.🚀 Which of these goes backward? (a) the rowing boat (b) the rocket (c) air from the balloon (d) the swimmer
5. 5.🛟 Which of these sinks in water? (a) a cork (b) an ice cube (c) a steel spoon (d) a dry leaf
6. 6.🧺 Which of these is not needed for the float-or-sink test? (a) turmeric powder (b) a tub of water (c) a results table (d) a towel for spills
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is the one thing we change. (a) False (b) True
8. 8.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) it turns to ice (c) the water increases (d) some water evaporates
9. 9.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) sticky tape (c) a drinking straw (d) vinegar
10. 10.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
11. 11.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
12. 12.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of the layers (b) the same glass (c) the order of pouring (d) the same three liquids
13. 13.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a mirror (b) food colour (c) a glass of water (d) a few hours of waiting
14. 14.🥛 Which of these works by magnetism? (a) a drinking straw (b) a magnetic chess set (c) a medicine dropper (d) a suction hook
15. 15.🥄 Which of these dissolves faster? (a) sugar in icy water (b) sugar left unstirred (c) powdered sugar (d) a big sugar cube
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.True or false: a magnetic chess set works by magnetism. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) an ice-cream stick (b) a cork (c) a glass marble (d) a ping-pong ball
19. 19.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
20. 20.True or false: a glass marble is denser than water. (a) True (b) False
21. 21.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is kept the same. (a) True (b) False
22. 22.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a pet (c) a grown-up (d) a toddler
23. 23.True or false: a steel spoon sinks in water. (a) False (b) True
24. 24.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.True or false: a magnet is not needed for the water cycle bowl. (a) True (b) False
26. 26.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
27. 27.True or false: the rocket goes backward. (a) False (b) True
28. 28.🥄 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) table salt (d) sawdust
29. 29.True or false: yeast is not needed for the water rainbow. (a) False (b) True
30. 30.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) the water turns solid (c) the sugar turns to salt (d) some stays undissolved
31. 31.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a tub of water (c) a battery cell (d) a towel for spills
32. 32.🧺 Which of these is needed for the density tower? (a) honey (b) a battery cell (c) a balloon (d) a mirror
33. 33.⚖️ 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) whether the card stays (c) the same card (d) how full the glass is
34. 34.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) cling film (c) water (d) a magnet
35. 35.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is hot (d) oil is sticky
36. 36.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it will not break (d) it is hotter
37. 37.🧺 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 mirror (d) a results table
38. 38.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) bright sunlight (c) a magnet (d) yeast
39. 39.🚁 Dropped from a raised hand, does a toy parachute fall slowly or fast? (a) falls fast (b) falls slowly
40. 40.🧺 Do we need a strip of paper for the paper helicopter? (a) not needed (b) needed

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids