Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 535 · 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 a bigger balloon go farther along the string? Which of these is the one thing we change? (a) distance it travels (b) the same string (c) how big we blow it (d) the same straw
2. 2.True or false: a feather sinks in water. (a) False (b) True
3. 3.🌈 How many colours do we name in a rainbow (VIBGYOR)?
4. 4.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it sinks faster (b) it can float (c) it turns to stone (d) it dissolves
6. 6.⚖️ 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 sugar (b) the kind of sugar (c) the water temperature (d) time to dissolve
7. 7.🧺 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 magnet (d) a towel for spills
8. 8.True or false: sand dissolves in water. (a) True (b) False
9. 9.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) sunlight (c) cling film (d) turmeric powder
10. 10.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they mix for ever (b) they become solid (c) they separate again (d) they turn to honey
11. 11.🛟 Who should trim the flower stem? (a) a pet (b) a grown-up (c) anyone, without looking (d) a toddler
12. 12.📘 What do we call water with sugar dissolved in it? (a) a solution (b) a rainbow (c) a crystal (d) a magnet
13. 13.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) powdered sugar (c) a big sugar cube (d) sugar in icy water
14. 14.True or false: sugar in warm water dissolves faster. (a) False (b) True
15. 15.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
16. 16.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
17. 17.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the person dropping”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
19. 19.🔍 Which is the odd one out? (a) a steel spoon (b) an ice-cream stick (c) a pebble (d) a glass marble
20. 20.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) sand (d) sugar
21. 21.True or false: a tub of water is not needed for the float-or-sink test. (a) False (b) True
22. 22.True or false: sugar does not dissolve in water. (a) True (b) False
23. 23.🚁 Why does the paper helicopter fall slowly? (a) air pushes on its blades (b) a magnet holds it (c) the floor pushes it (d) it has no weight
24. 24.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) pour more water (c) wipe them dry (d) slide on them
25. 25.🧺 Which of these is not needed for the paper helicopter? (a) a balloon (b) a ruler (c) a strip of paper (d) a pencil
26. 26.🥄 Does sugar stirred well dissolve faster or slower? (a) slower (b) faster
27. 27.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) neither of them (c) the sugar cube (d) powdered sugar
28. 28.🧺 Which of these is needed for the density tower? (a) water with food colour (b) a mirror (c) a battery cell (d) a balloon
29. 29.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.💧 Which of these is melting? (a) snow turning to water (b) dew on morning grass (c) making ice lollies (d) a puddle drying up
31. 31.True or false: yeast is needed for the paper helicopter. (a) True (b) False
32. 32.True or false: a magnet is not needed for the water cycle bowl. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a rubber eraser (b) a steel spoon (c) a piece of foil (d) a cotton thread
34. 34.⚖️ 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 same three liquids”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to hide the corks (c) to win a prize (d) to splash everyone
36. 36.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
37. 37.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) food colour (c) a white flower (d) a balloon
38. 38.🥄 Why does sugar dissolve faster in warm water? (a) cold water is wet (b) particles move faster (c) sugar likes the dark (d) warm water is thicker
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the time of day (b) the amount of water (c) the same glass (d) the same window
40. 40.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a clock or timer (c) warm water (d) honey

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