Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 700 · 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.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) backward (b) it stays still (c) straight down (d) forward
2. 2.True or false: turmeric powder is needed for the water cycle bowl. (a) True (b) False
3. 3.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) never look at the Sun (d) stare at the Sun
4. 4.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
5. 5.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a sheet of white paper (d) a mirror
6. 6.⚖️ 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 room it stands in (b) the kind of flower (c) the length of the stem (d) the amount of colour
7. 7.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the way we turn it (b) whether the card stays (c) the same card (d) the same glass
8. 8.🛟 Does an ice cube float or sink in water? (a) floats (b) sinks
9. 9.💧 Which of these is evaporation? (a) sweat drying on skin (b) butter going runny (c) drops under a pot lid (d) dew on morning grass
10. 10.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) the rainbow fades (d) it floats away
11. 11.💧 Which of these is melting? (a) sweat drying on skin (b) snow turning to water (c) a puddle drying up (d) wet clothes drying
12. 12.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) water splits the light (d) the paper makes colours
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.🔍 You drop a coin into a tub of water. What do you see? (a) it bounces up (b) it dissolves (c) it floats (d) it sinks
15. 15.🛟 Which of these floats on water? (a) a coin (b) a metal key (c) a glass marble (d) a ping-pong ball
16. 16.True or false: powdered sugar dissolves faster. (a) True (b) False
17. 17.🧺 Which of these is needed for the density tower? (a) a magnet (b) cooking oil (c) a balloon (d) turmeric powder
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) True (b) False
19. 19.💧 Which of these lets water climb up it? (a) a piece of foil (b) a cotton thread (c) a rubber eraser (d) a steel spoon
20. 20.🧺 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
21. 21.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is less dense (c) oil is heavier (d) oil is hot
22. 22.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
23. 23.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) the bottle is magnetic (d) water is hiding there
24. 24.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.True or false: sugar stirred well dissolves faster. (a) False (b) True
26. 26.🥄 Does sugar in icy water dissolve faster or slower? (a) slower (b) faster
27. 27.📘 What is the push of air on a falling thing called? (a) dissolving (b) magnetism (c) floating (d) air resistance
28. 28.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) cooking oil (d) sand
29. 29.True or false: a balloon is not needed for the paper helicopter. (a) True (b) False
30. 30.💧 Which of these does not let water climb? (a) a cotton thread (b) a paper towel (c) a glass marble (d) a flower stem
31. 31.True or false: two chairs is needed for the balloon rocket. (a) True (b) False
32. 32.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) turmeric powder (c) water (d) cling film
36. 36.🔮 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
37. 37.True or false: the rowing boat goes forward. (a) True (b) False
38. 38.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) how many drops form (b) the amount of water (c) the size of the bowl (d) the cling film cover

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