Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 593 · 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.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) the sugar turns to salt (c) the water turns solid (d) some stays undissolved
2. 2.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) chalk powder (d) sugar
3. 3.🎈 When does the balloon rocket stop? (a) when it gets cold (b) when it turns blue (c) it never stops (d) when the air runs out
4. 4.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
5. 5.🧺 Do we need a magnet for the density tower? (a) needed (b) not needed
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 amount of water (c) the length of the stem (d) the amount of colour
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
9. 9.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) True (b) False
10. 10.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to keep children safe (c) to splash everyone (d) to hide the corks
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) cling film (c) a mirror (d) ice cubes
13. 13.📘 What do we call water with sugar dissolved in it? (a) a crystal (b) a magnet (c) a solution (d) a rainbow
14. 14.⚖️ 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 measure it (c) we change it
15. 15.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) never look at the Sun (d) stare at the Sun
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a stiff postcard (c) a battery cell (d) a glass of water
17. 17.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) yeast (c) a white flower (d) a balloon
18. 18.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar left unstirred (c) sugar in icy water (d) sugar stirred well
19. 19.True or false: yeast is not needed for the water rainbow. (a) True (b) False
20. 20.🛟 What should you do with popped balloon pieces? (a) chew them (b) keep them in your mouth (c) throw them away safely (d) give them to a baby
21. 21.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) safety scissors (c) yeast (d) a pencil
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.🍯 Is honey denser or less dense than water? (a) denser than water (b) less dense than water
24. 24.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) sunshine (b) wind (c) rain (d) lightning
25. 25.True or false: a paper towel lets water climb up it. (a) False (b) True
26. 26.🚁 Dropped from a raised hand, does a crumpled paper ball fall slowly or fast? (a) falls fast (b) falls slowly
27. 27.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) do not lick the spoon (c) throw the glass (d) taste each layer
28. 28.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) it has no weight (c) air pushes on its blades (d) the floor pushes it
29. 29.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) how big we blow it (b) the same string (c) distance it travels
30. 30.True or false: table salt does not dissolve in water. (a) True (b) False
31. 31.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the same glass (c) the amount of water
32. 32.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the water turns to ice (d) the glass breaks
33. 33.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) on a bed (d) near a plug point
34. 34.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) food colour (c) a few hours of waiting (d) turmeric powder
35. 35.True or false: a suction hook works by magnetism. (a) True (b) False
36. 36.☀️ What is white sunlight really made of? (a) only yellow light (b) many colours mixed (c) tiny drops of water (d) tiny bits of dust
37. 37.True or false: water becoming ice is freezing. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a ping-pong ball (b) cooking oil (c) honey (d) a cork
39. 39.💧 Which of these lets water climb up it? (a) a steel spoon (b) a cotton thread (c) a glass marble (d) a plastic ruler
40. 40.🧺 Which of these is not needed for the paper helicopter? (a) yeast (b) a strip of paper (c) safety scissors (d) a pencil

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