Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 430 · 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 a safe rule for the balloon rocket? (a) put string round a neck (b) aim it at your friend (c) blow it till it bursts (d) keep it away from faces
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a glass of water (d) a stiff postcard
3. 3.🥄 Which of these dissolves faster? (a) sugar in warm water (b) sugar left unstirred (c) sugar in icy water (d) a big sugar cube
4. 4.True or false: dew on morning grass is freezing. (a) True (b) False
5. 5.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) turmeric powder (b) cling film (c) a big bowl (d) ice cubes
6. 6.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.True or false: a balloon is needed for the paper helicopter. (a) False (b) True
8. 8.🛟 Which of these sinks in water? (a) a piece of thermocol (b) a dry leaf (c) an iron nail (d) a feather
9. 9.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is kept the same. (a) False (b) True
10. 10.🚀 Which of these goes forward? (a) water a swimmer pushes (b) air from the balloon (c) gas from the rocket (d) the swimmer
11. 11.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
13. 13.🧺 Do we need a balloon for the water cycle bowl? (a) needed (b) not needed
14. 14.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) the paper clip (c) time to reach the floor
16. 16.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a balloon
18. 18.🌈 How many colours do we name in a rainbow (VIBGYOR)?
19. 19.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a drinking straw
20. 20.💧 Which change is this: ice becoming water? (a) freezing (b) condensation (c) evaporation (d) melting
21. 21.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns all red (c) it turns brighter (d) the rainbow fades
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the length of the stem (b) the room it stands in (c) time for colour to show
23. 23.🛟 Who should trim the flower stem? (a) a toddler (b) a pet (c) anyone, without looking (d) a grown-up
24. 24.🥄 Which of these dissolves slower? (a) sugar stirred well (b) powdered sugar (c) sugar in icy water (d) sugar in warm water
25. 25.🔮 A cork floats in tap water. What happens in very salty water? (a) it sinks (b) it still floats (c) it turns white (d) it dissolves
26. 26.🍯 Is a ping-pong ball denser or less dense than water? (a) less dense than water (b) denser than water
27. 27.True or false: the rowing boat goes forward. (a) True (b) False
28. 28.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a magnet (c) a spoon (d) water with food colour
29. 29.True or false: air is denser than water. (a) True (b) False
30. 30.🚁 Dropped from a raised hand, does a feather fall slowly or fast? (a) falls slowly (b) falls fast
31. 31.🎈 What is the job of the straw on the string? (a) it guides the balloon (b) it holds water (c) it makes it heavier (d) it blows air in
32. 32.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.True or false: a strip of cloth lets water climb up it. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) a dry leaf (b) an empty capped bottle (c) a steel spoon (d) a piece of thermocol
35. 35.🔍 Which is the odd one out? (a) butter going runny (b) snow turning to water (c) a pond icing over (d) ice becoming water
36. 36.🚢 Why can a heavy steel ship float on the sea? (a) sea water is warm (b) steel is very light (c) its hollow shape (d) it has a magnet
37. 37.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) wipe up spills at once (c) run around the tub (d) play near a deep pond
38. 38.🛟 Which of these floats on water? (a) an ice-cream stick (b) a steel spoon (c) a ball of clay (d) a metal key
39. 39.🥄 Does sugar left unstirred dissolve faster or slower? (a) faster (b) slower
40. 40.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) the sugar cube (c) both the same (d) powdered sugar

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