Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 160 · 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) yeast (c) a magnet (d) a results table
2. 2.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.True or false: a strip of cloth does not let water climb. (a) False (b) True
5. 5.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
6. 6.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the big log (b) neither of them (c) the small pebble (d) both of them
7. 7.🍯 Which of these is less dense than water? (a) cooking oil (b) honey (c) a pebble (d) a coin
8. 8.True or false: a crumpled paper ball falls fast through the air. (a) False (b) True
9. 9.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) red (c) violet (d) blue
10. 10.🧺 Which of these is needed for the density tower? (a) turmeric powder (b) water with food colour (c) a magnet (d) a balloon
11. 11.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) True (b) False
12. 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the amount of clay (b) the shape of the clay (c) the tub of water (d) the kind of clay
13. 13.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
15. 15.🧺 Which of these is not needed for the paper helicopter? (a) a strip of paper (b) safety scissors (c) a pencil (d) yeast
16. 16.🛟 Which of these floats on water? (a) a metal key (b) a steel spoon (c) an iron nail (d) an ice-cream stick
17. 17.🚁 Dropped from a raised hand, does a toy parachute fall slowly or fast? (a) falls fast (b) falls slowly
18. 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the amount of clay (b) whether it floats (c) the shape of the clay
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
20. 20.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) table salt (d) sand
21. 21.🧺 Which of these is not needed for the water cycle bowl? (a) ice cubes (b) a big bowl (c) cling film (d) a balloon
22. 22.True or false: turmeric powder is needed for the water cycle bowl. (a) True (b) False
23. 23.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it turns into a kite (c) it changes colour (d) it can pop loudly
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.True or false: a battery cell is not needed for the float-or-sink test. (a) False (b) True
26. 26.💧 Which change is this: a pond icing over? (a) condensation (b) melting (c) evaporation (d) freezing
27. 27.True or false: drops under a pot lid is condensation. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) snow turning to water (b) butter going runny (c) wet clothes drying (d) ice becoming water
29. 29.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the length of the stem (b) the room it stands in (c) time for colour to show
30. 30.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
31. 31.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) a magnet (c) two clear glasses (d) sugar
32. 32.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) powdered sugar (c) the sugar cube (d) neither of them
33. 33.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to keep children safe (c) to win a prize (d) to hide the corks
34. 34.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) faster (b) they never dry (c) slower (d) they turn to ice
35. 35.📘 What does “dense” mean? (a) very thin (b) very hot (c) very colourful (d) heavy for its size
36. 36.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is what we measure. (a) False (b) True
37. 37.True or false: air from the balloon goes forward. (a) False (b) True
38. 38.True or false: a feather floats on water. (a) False (b) True
39. 39.🧺 Do we need a battery cell for the balloon rocket? (a) needed (b) not needed
40. 40.🛟 What should you do after handling food colour? (a) wipe them on walls (b) lick your fingers (c) wash your hands (d) rub your eyes

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