Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 342 · 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 is less dense than water? (a) a glass marble (b) a ping-pong ball (c) honey (d) very salty water
2. 2.🍯 Is an ice cube denser or less dense than water? (a) less dense than water (b) denser than water
3. 3.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the drop height (b) time to reach the floor (c) the length of the blades
4. 4.True or false: yeast is not needed for the water rainbow. (a) True (b) False
5. 5.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🥄 Does sugar left unstirred dissolve faster or slower? (a) faster (b) slower
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of sugar (c) the amount of water (d) time to dissolve
8. 8.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) dew on morning grass (b) drops under a pot lid (c) a pond icing over (d) drops on a cold glass
10. 10.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
11. 11.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the water turns to ice (c) the glass breaks (d) the card flies away
12. 12.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sawdust (d) glucose powder
13. 13.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
14. 14.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
15. 15.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.True or false: sweat drying on skin is evaporation. (a) False (b) True
17. 17.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
18. 18.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it flies off the string (c) it turns into a kite (d) it goes less far
19. 19.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) a mirror (d) a results table
21. 21.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is magnetic (c) hot water is heavy (d) hot water can scald
22. 22.True or false: turmeric powder is needed for the paper helicopter. (a) False (b) True
23. 23.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a white flower (c) a glass of water (d) a balloon
24. 24.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) turmeric powder (b) a sunny window (c) a clear glass of water (d) bright sunlight
25. 25.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a roof edge (c) from your raised hand (d) a wobbly chair
26. 26.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) safety scissors (c) a strip of paper (d) a mirror
27. 27.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) on top of the oil (c) in the honey layer (d) in the water layer
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) whether the card stays (b) the same glass (c) how full the glass is (d) the way we turn it
29. 29.🧺 Which of these is not needed for the paper helicopter? (a) a pencil (b) a paper clip (c) a strip of paper (d) a battery cell
30. 30.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
31. 31.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the person dropping”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) yeast (c) a balloon (d) a mirror
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a spoon (c) water with food colour (d) a balloon
34. 34.True or false: very salty water is less dense than water. (a) True (b) False
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) False (b) True
37. 37.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to hide the corks (c) to keep children safe (d) to splash everyone
38. 38.True or false: a steel spoon lets water climb up it. (a) False (b) True
39. 39.🛟 Who should trim the flower stem? (a) a toddler (b) a grown-up (c) a pet (d) anyone, without looking
40. 40.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) no change at all (c) more friction, less far (d) it goes faster

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