Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 848 · 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 — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of the layers (b) the same glass (c) the order of pouring
2. 2.True or false: two chairs is not needed for the balloon rocket. (a) True (b) False
3. 3.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a towel for spills (c) a magnet (d) a results table
4. 4.💧 Which of these lets water climb up it? (a) a paper towel (b) a rubber eraser (c) a plastic ruler (d) a glass marble
5. 5.True or false: a balloon is needed for the coloured flower experiment. (a) False (b) True
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.🚁 What does the paper helicopter do as it falls? (a) it stays still in air (b) it turns into a ball (c) it spins round (d) it flies upward
8. 8.True or false: a mirror is needed for the water rainbow. (a) False (b) True
9. 9.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) True (b) False
10. 10.🛟 Which is a safe rule for the balloon rocket? (a) blow it till it bursts (b) aim it at your friend (c) put string round a neck (d) keep it away from faces
11. 11.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🥄 Which of these dissolves slower? (a) sugar in warm water (b) sugar in icy water (c) sugar stirred well (d) powdered sugar
13. 13.🧺 Which of these is needed for the density tower? (a) a spoon (b) a battery cell (c) a balloon (d) yeast
14. 14.🧺 Do we need yeast for the paper helicopter? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) a paper helicopter (b) a glass marble (c) a feather (d) an open sheet of paper
16. 16.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it turns into a kite (c) it gets too heavy (d) it changes colour
17. 17.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a balloon (c) a sheet of white paper (d) bright sunlight
18. 18.🛟 What should you do after handling food colour? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) wipe them on walls
19. 19.True or false: very salty water is denser than water. (a) False (b) True
20. 20.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
21. 21.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass leaks (b) ice escapes the glass (c) the glass sweats (d) vapour in air cools
22. 22.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) more plain water (c) a few ice cubes (d) lots of salt stirred in
23. 23.🛟 Does an ice-cream stick float or sink in water? (a) sinks (b) floats
24. 24.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
27. 27.🔮 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) the bottle is magnetic (d) water is hiding there
28. 28.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
29. 29.True or false: a big sugar cube dissolves faster. (a) True (b) False
30. 30.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) a strip of paper (c) a ruler (d) turmeric powder
31. 31.⚖️ 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 kind of clay (b) the amount of clay (c) the tub of water (d) the shape of the clay
32. 32.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
33. 33.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) wipe them dry (c) pour more water (d) leave them wet
34. 34.True or false: a pencil is needed for the paper helicopter. (a) False (b) True
35. 35.True or false: powdered sugar dissolves slower. (a) False (b) True
36. 36.🧺 Which of these is needed for the water cycle bowl? (a) yeast (b) ice cubes (c) turmeric powder (d) a balloon
37. 37.🧺 Do we need warm water for the dissolving test? (a) needed (b) not needed
38. 38.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.🔍 Which is the odd one out? (a) a toy parachute (b) a paper helicopter (c) an open sheet of paper (d) a stone
40. 40.⚖️ 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

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