Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 948 · 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 colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the length of the stem (b) the amount of water (c) the amount of colour (d) time for colour to show
2. 2.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
3. 3.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes backward (b) goes forward
4. 4.🧺 Which of these is needed for the paper helicopter? (a) a strip of paper (b) a magnet (c) a balloon (d) yeast
5. 5.🧺 Do we need water with food colour for the density tower? (a) not needed (b) needed
6. 6.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
7. 7.🔍 Which is the odd one out? (a) air (b) cooking oil (c) an ice cube (d) a coin
8. 8.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
9. 9.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) the water increases (b) some water evaporates (c) it turns to ice (d) it turns to salt
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.True or false: chalk powder dissolves in water. (a) False (b) True
12. 12.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) a few hours of waiting (d) a balloon
13. 13.💧 Which change is this: a puddle drying up? (a) condensation (b) evaporation (c) freezing (d) melting
14. 14.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the kind of sugar (b) the amount of water (c) the water temperature (d) time to dissolve
15. 15.🥄 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) chalk powder (d) sugar
16. 16.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a long string (c) a magnet (d) sticky tape
19. 19.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) False (b) True
20. 20.🥄 Which of these dissolves slower? (a) a big sugar cube (b) sugar in warm water (c) powdered sugar (d) sugar stirred well
21. 21.🧺 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 mirror (d) a glass of water
22. 22.🔮 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 turn to honey (d) they separate again
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
24. 24.🛟 Does an ice cube float or sink in water? (a) sinks (b) floats
25. 25.True or false: a clock or timer is needed for the dissolving test. (a) True (b) False
26. 26.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it in a mirror (c) look at it through glass (d) stare at the Sun
27. 27.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) on top of the oil (c) in the honey layer (d) under the honey
28. 28.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a vacuum cleaner (c) a magnetic pin holder (d) a compass needle
29. 29.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
30. 30.🥄 Which of these dissolves slower? (a) sugar stirred well (b) sugar in icy water (c) sugar in warm water (d) powdered sugar
31. 31.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so the Sun moves (d) so it does not fall
32. 32.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to cool the glass (d) to grow plants
33. 33.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a fridge magnet (d) a compass needle
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) False (b) True
35. 35.🛟 Where is a safe place to drop the helicopter from? (a) a roof edge (b) a wobbly chair (c) from your raised hand (d) a high window ledge
36. 36.🧺 Which of these is needed for the balloon rocket? (a) a magnet (b) yeast (c) a mirror (d) a balloon
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🧺 Which of these is needed for the paper helicopter? (a) yeast (b) turmeric powder (c) a ruler (d) a balloon
39. 39.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a mirror (c) a tub of water (d) a results table
40. 40.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed

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