Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 20 · 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 is the odd one out? (a) a ball of clay (b) a coin (c) a dry leaf (d) a glass marble
2. 2.🥄 Which of these dissolves slower? (a) sugar stirred well (b) sugar in warm water (c) sugar left unstirred (d) powdered sugar
3. 3.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
4. 4.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
5. 5.🧺 Do we need a balloon for the density tower? (a) needed (b) not needed
6. 6.🧺 Do we need a balloon for the dissolving test? (a) needed (b) not needed
7. 7.🔍 Sand is stirred into water. What do you see after a while? (a) it floats up (b) it turns blue (c) it settles at the bottom (d) it dissolves
8. 8.True or false: a tall clear glass is not needed for the density tower. (a) False (b) True
9. 9.🌈 How many colours do we name in a rainbow (VIBGYOR)?
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a glass of water (d) a battery cell
11. 11.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they never dry (b) they turn to ice (c) slower (d) faster
12. 12.⚖️ 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 glass”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (c) look at it in a mirror (d) never look at the Sun
14. 14.🛟 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
15. 15.🧺 Which of these is needed for the balloon rocket? (a) vinegar (b) turmeric powder (c) a magnet (d) a long string
16. 16.True or false: a results table is needed for the float-or-sink test. (a) False (b) True
17. 17.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a drinking straw (c) a mirror (d) a long string
18. 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it turns white (c) it still floats (d) it sinks
20. 20.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a few hours of waiting (c) a balloon (d) a glass of water
21. 21.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) a clock or timer (c) honey (d) cold water
22. 22.🚁 Which of these falls slowly through the air? (a) a fluff of cotton (b) a crumpled paper ball (c) a steel spoon (d) a coin
23. 23.📘 What pulls the paper helicopter down to the floor? (a) gravity (b) magnetism (c) air pressure (d) the wind
24. 24.🔍 Which is the odd one out? (a) snow turning to water (b) butter going runny (c) ice becoming water (d) drops on a cold glass
25. 25.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) hot water is magnetic (c) it changes colour (d) hot water can scald
26. 26.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a towel for spills (c) a tub of water (d) small test objects
27. 27.⚖️ 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) whether it floats (c) the kind of clay
28. 28.🧺 Do we need ice cubes for the water cycle bowl? (a) not needed (b) needed
29. 29.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
30. 30.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the water temperature (b) time to dissolve (c) the kind of sugar
31. 31.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
32. 32.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same glass (b) how full the glass is (c) the way we turn it (d) the same card
36. 36.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.True or false: sugar left unstirred dissolves slower. (a) True (b) False
38. 38.🧺 Do we need a battery cell for the water cycle bowl? (a) not needed (b) needed
39. 39.True or false: cooking oil does not dissolve in water. (a) False (b) True
40. 40.🧺 Which of these is needed for the dissolving test? (a) honey (b) sugar (c) a comb (d) a magnet

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