Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 70 · 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.True or false: a paper clip is needed for the paper helicopter. (a) False (b) True
2. 2.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
3. 3.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it melts (c) it turns blue (d) it floats higher
4. 4.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) a big bowl (c) a magnet (d) a small cup
6. 6.True or false: a mirror is not needed for the balloon rocket. (a) False (b) True
7. 7.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
8. 8.🧺 Which of these is needed for the float-or-sink test? (a) a tub of water (b) a battery cell (c) a mirror (d) a magnet
9. 9.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is heavier (c) oil is less dense (d) oil is sticky
10. 10.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a medicine dropper (d) a magnetic pin holder
11. 11.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) more friction, less far (c) less friction (d) it goes faster
12. 12.💧 Which of these lets water climb up it? (a) a cotton thread (b) a glass marble (c) a piece of foil (d) a plastic ruler
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) True (b) False
14. 14.True or false: a bicycle pump works by air pressure. (a) True (b) False
15. 15.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the oil layer (b) in the water layer (c) at the very bottom (d) on top of the oil
16. 16.🛟 Which of these floats on water? (a) a dry leaf (b) an iron nail (c) a pebble (d) a steel spoon
17. 17.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) small test objects (c) a tub of water (d) a battery cell
18. 18.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a mirror (b) a fridge magnet (c) a balloon rocket (d) a sundial
19. 19.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) distance it travels (c) the same tape (d) how big we blow it
20. 20.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is what we measure. (a) True (b) False
21. 21.💧 Which change is this: wet hair drying? (a) condensation (b) evaporation (c) freezing (d) melting
22. 22.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) a drinking straw (c) yeast (d) sticky tape
23. 23.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
24. 24.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is magnetic (d) it is heavier
25. 25.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sheet of white paper (c) yeast (d) a sunny window
26. 26.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) ice cubes (c) a mirror (d) water
27. 27.True or false: a cotton thread does not let water climb. (a) True (b) False
28. 28.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.🔍 Which is the odd one out? (a) a glass marble (b) honey (c) a pebble (d) air
30. 30.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the water cycle bowl? (a) a balloon (b) a battery cell (c) a mirror (d) ice cubes
32. 32.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) a results table (d) a magnet
33. 33.🔍 Which is the odd one out? (a) honey (b) very salty water (c) a coin (d) a ping-pong ball
34. 34.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) sawdust (d) sand
35. 35.True or false: a mirror is needed for the density tower. (a) False (b) True
36. 36.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a vacuum cleaner (d) a magnetic pin holder
37. 37.🧺 Which of these is not needed for the paper helicopter? (a) a pencil (b) a paper clip (c) a balloon (d) a strip of paper
38. 38.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) look at it in a mirror (d) never look at the Sun
39. 39.🔮 Predict: you fold the two blades the other way. What changes? (a) it does not fall (b) it turns blue (c) it spins the other way (d) it falls upward
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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