Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 346 · 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 paper helicopter? (a) turmeric powder (b) a magnet (c) a paper clip (d) a mirror
2. 2.True or false: turmeric powder is needed for the float-or-sink test. (a) True (b) False
3. 3.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) at the very bottom (c) in the water layer (d) in the oil layer
4. 4.🔍 Which is the odd one out? (a) a dry leaf (b) a glass marble (c) a piece of thermocol (d) an ice cube
5. 5.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) it stops in the air (c) it floats up (d) faster
6. 6.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
7. 7.🧺 Do we need a magnet for the balloon rocket? (a) not needed (b) needed
8. 8.True or false: a balloon is needed for the paper helicopter. (a) False (b) True
9. 9.🚁 Dropped from a raised hand, does an open sheet of paper fall slowly or fast? (a) falls fast (b) falls slowly
10. 10.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the flat sheet (b) a sheet of glass (c) the crumpled ball (d) neither of them
11. 11.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is the one thing we change. (a) False (b) True
12. 12.⚖️ 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) the kind of clay (c) whether it floats
13. 13.🔍 Which is the odd one out? (a) a pebble (b) a glass marble (c) cooking oil (d) very salty water
14. 14.True or false: a mirror is needed for the density tower. (a) False (b) True
15. 15.💧 Which of these does not let water climb? (a) a sugar cube (b) a cotton thread (c) a paper towel (d) a plastic ruler
16. 16.🍯 Which of these is denser than water? (a) a cork (b) cooking oil (c) a ping-pong ball (d) a coin
17. 17.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) pour more water (c) wipe them dry (d) leave them wet
18. 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) honey (c) yeast (d) water with food colour
20. 20.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to hide the corks (c) to keep children safe (d) to splash everyone
21. 21.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) two chairs (c) a magnet (d) yeast
22. 22.⚖️ 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) distance it travels (c) the same tape
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the amount of sugar (b) time to dissolve (c) the water temperature
25. 25.🌈 In VIBGYOR, what number colour is red?
26. 26.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is less dense (c) oil is sticky (d) oil is heavier
27. 27.🧺 Which of these is not needed for the coloured flower experiment? (a) a balloon (b) food colour (c) a few hours of waiting (d) a white flower
28. 28.🧺 Which of these is needed for the water cycle bowl? (a) a battery cell (b) cling film (c) yeast (d) a magnet
29. 29.True or false: the balloon goes forward. (a) False (b) True
30. 30.🧺 Which of these is needed for the density tower? (a) a magnet (b) cooking oil (c) a mirror (d) turmeric powder
31. 31.🧺 Do we need a mirror for the paper helicopter? (a) needed (b) not needed
32. 32.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is what we measure. (a) False (b) True
33. 33.True or false: the rocket goes backward. (a) True (b) False
34. 34.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
35. 35.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.True or false: cooking oil is denser than water. (a) True (b) False
37. 37.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
38. 38.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
39. 39.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) time to reach the floor (b) the length of the blades (c) the paper clip (d) the person dropping
40. 40.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is the one thing we change. (a) True (b) False

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