Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 114 · 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.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to win a prize (c) to hide the corks (d) to splash everyone
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) turmeric powder (d) a glass of water
3. 3.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) hot water is magnetic (c) hot water is heavy (d) it changes colour
4. 4.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the stem turns to ice (c) the petals turn bluish (d) the water turns green
5. 5.🍯 Which of these is less dense than water? (a) cooking oil (b) a pebble (c) a coin (d) very salty water
6. 6.True or false: yeast is needed for the float-or-sink test. (a) False (b) True
7. 7.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) sand (d) air
8. 8.True or false: powdered sugar dissolves faster. (a) True (b) False
9. 9.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a tub of water (c) yeast (d) a results table
10. 10.🧺 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 towel (c) a glass of water (d) a battery cell
11. 11.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) sugar in icy water (d) sugar in warm water
12. 12.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) a few hours of waiting (d) a magnet
13. 13.🧺 Do we need a mirror for the dissolving test? (a) needed (b) not needed
14. 14.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
15. 15.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
16. 16.🛟 Does a cork float or sink in water? (a) sinks (b) floats
17. 17.🚢 Why can a heavy steel ship float on the sea? (a) sea water is warm (b) it has a magnet (c) its hollow shape (d) steel is very light
18. 18.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) rain (b) wind (c) lightning (d) sunshine
19. 19.🧺 Do we need a small cup for the water cycle bowl? (a) not needed (b) needed
20. 20.💧 Which of these is melting? (a) snow turning to water (b) a puddle drying up (c) sweat drying on skin (d) drops under a pot lid
21. 21.⚖️ 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) how many drops form (b) the size of the bowl (c) the time we wait (d) sun or shade
22. 22.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.True or false: glucose powder does not dissolve in water. (a) True (b) False
24. 24.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the amount of water (b) time for colour to show (c) the room it stands in (d) the amount of colour
25. 25.True or false: two clear glasses is needed for the dissolving test. (a) True (b) False
26. 26.True or false: baking soda does not dissolve in water. (a) True (b) False
27. 27.⚖️ 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) the amount of water (b) sun or shade (c) how many drops form (d) the cling film cover
28. 28.🧺 Which of these is not needed for the coloured flower experiment? (a) a battery cell (b) a glass of water (c) food colour (d) a white flower
29. 29.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a towel for spills (c) a tub of water (d) small test objects
30. 30.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the kind of sugar is the one thing we change. (a) True (b) False
31. 31.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
32. 32.🛟 Which of these floats on water? (a) an empty capped bottle (b) an iron nail (c) a glass marble (d) a coin
33. 33.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed
34. 34.🧺 Do we need a teaspoon for the dissolving test? (a) needed (b) not needed
35. 35.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
36. 36.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) a battery cell (c) a magnet (d) safety scissors
37. 37.True or false: very salty water is less dense than water. (a) True (b) False
38. 38.🔮 Predict: you add two more paper clips. How does it fall? (a) it stops in the air (b) it floats up (c) slower (d) faster
39. 39.🧺 Which of these is needed for the dissolving test? (a) a comb (b) cotton wool (c) two clear glasses (d) a mirror
40. 40.🛟 Which is a safe rule for the balloon rocket? (a) blow it till it bursts (b) put string round a neck (c) aim it at your friend (d) keep it away from faces

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