Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 8 · 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 of these works by magnetism? (a) a medicine dropper (b) a fridge magnet (c) a suction hook (d) a drinking straw
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a balloon
3. 3.🧺 Do we need yeast for the density tower? (a) needed (b) not needed
4. 4.🛟 How should you check if the sugar has dissolved? (a) poke it with a finger (b) smell it closely (c) taste it (d) look for leftover grains
5. 5.True or false: an ice cube is denser than water. (a) True (b) False
6. 6.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the amount of water
7. 7.True or false: a mirror is needed for the coloured flower experiment. (a) False (b) True
8. 8.🌈 In VIBGYOR, what number colour is green?
9. 9.🧺 Which of these is needed for the balloon rocket? (a) a drinking straw (b) vinegar (c) a mirror (d) a magnet
10. 10.💧 Which of these does not let water climb? (a) a plastic ruler (b) a sugar cube (c) a cotton thread (d) a piece of chalk
11. 11.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) turmeric powder (d) a clear glass of water
12. 12.True or false: a drinking straw is needed for the balloon rocket. (a) False (b) True
13. 13.📘 What do we call light bending as it passes from air into water? (a) refraction (b) magnetism (c) reflection (d) evaporation
14. 14.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.🥄 Which of these dissolves slower? (a) sugar left unstirred (b) sugar stirred well (c) sugar in warm water (d) powdered sugar
16. 16.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed
17. 17.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
18. 18.🛟 Which of these sinks in water? (a) a pebble (b) an ice-cream stick (c) a piece of thermocol (d) an ice cube
19. 19.💧 Which change is this: drops under a pot lid? (a) freezing (b) condensation (c) melting (d) evaporation
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🛟 Which of these floats on water? (a) a coin (b) a steel spoon (c) an ice cube (d) a pebble
22. 22.🔍 Which is the odd one out? (a) a cork (b) an ice cube (c) cooking oil (d) very salty water
23. 23.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they never dry (b) faster (c) they turn to ice (d) slower
24. 24.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) aim it at your friend (c) put string round a neck (d) blow it till it bursts
25. 25.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it spins the other way (c) it does not fall (d) it turns blue
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the same card (c) how full the glass is
27. 27.True or false: ice becoming water is evaporation. (a) True (b) False
28. 28.True or false: gas from the rocket goes forward. (a) False (b) True
29. 29.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) violet (b) orange (c) red (d) yellow
30. 30.True or false: a mirror is needed for the paper helicopter. (a) True (b) False
31. 31.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is magnetic (c) juice likes plastic (d) the straw is hot
32. 32.True or false: a crumpled paper ball falls slowly through the air. (a) True (b) False
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a balloon (c) a tall clear glass (d) water with food colour
34. 34.🛟 Does a steel spoon float or sink in water? (a) floats (b) sinks
35. 35.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a mirror (c) a drinking straw (d) two chairs
36. 36.True or false: water from the oars goes backward. (a) False (b) True
37. 37.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) nothing ever happens (c) colour climbs up it (d) it turns to plastic
38. 38.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the length of the blades (b) the drop height (c) time to reach the floor (d) the person dropping
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) a magnet
40. 40.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes backward (b) goes forward

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