Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 916 · 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 cotton thread does not let water climb. (a) True (b) False
2. 2.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
3. 3.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
4. 4.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is kept the same. (a) False (b) True
5. 5.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.True or false: a balloon is not needed for the float-or-sink test. (a) False (b) True
7. 7.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) it changes colour (c) hot water is heavy (d) hot water is magnetic
8. 8.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they all turn green (c) they turn two colours (d) they fall off at once
10. 10.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) not at all (b) slower (c) the same (d) faster
12. 12.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) anyone, without looking (d) a pet
13. 13.🧺 Which of these is not needed for the dissolving test? (a) cold water (b) a balloon (c) two clear glasses (d) a clock or timer
14. 14.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the same three liquids (b) the order of pouring (c) the same glass (d) the order of the layers
15. 15.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.True or false: a ball of clay sinks in water. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a metal key (b) a coin (c) an empty capped bottle (d) an iron nail
18. 18.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) time to reach the floor (b) the kind of paper (c) the length of the blades (d) the person dropping
19. 19.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it sinks at once (c) it turns to plastic (d) nothing ever happens
20. 20.True or false: turmeric powder is not needed for the float-or-sink test. (a) False (b) True
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a mirror
22. 22.True or false: cotton wool is not needed for the dissolving test. (a) True (b) False
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the water temperature (c) the amount of water
26. 26.🛟 Which of these sinks in water? (a) a ping-pong ball (b) a feather (c) an empty capped bottle (d) an iron nail
27. 27.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) poke it with a finger (c) taste it (d) smell it closely
28. 28.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the time we wait (b) the amount of water (c) how many drops form (d) sun or shade
29. 29.🚁 Which of these falls fast through the air? (a) a feather (b) a crumpled paper ball (c) a fluff of cotton (d) an open sheet of paper
30. 30.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) safety scissors (c) a balloon (d) a mirror
31. 31.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
32. 32.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it dissolves (b) it can float (c) it sinks faster (d) it turns to stone
33. 33.🛟 Which is a safe rule for the balloon rocket? (a) blow it till it bursts (b) keep it away from faces (c) aim it at your friend (d) put string round a neck
34. 34.True or false: a coin falls slowly through the air. (a) True (b) False
35. 35.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) red (d) green
36. 36.🧺 Which of these is needed for the dissolving test? (a) a balloon (b) sugar (c) cotton wool (d) a magnet
37. 37.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
38. 38.🧺 Do we need a balloon for the balloon rocket? (a) needed (b) not needed
39. 39.🥄 Why does sugar dissolve faster in warm water? (a) particles move faster (b) cold water is wet (c) warm water is thicker (d) sugar likes the dark
40. 40.🧺 Which of these is needed for the paper helicopter? (a) a magnet (b) turmeric powder (c) a mirror (d) a strip of paper

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