Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 248 · 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) honey (b) a pebble (c) a cork (d) a coin
2. 2.🛟 What should you do after handling food colour? (a) wipe them on walls (b) lick your fingers (c) rub your eyes (d) wash your hands
3. 3.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
4. 4.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the person dropping (b) the paper clip (c) the length of the blades (d) the drop height
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
7. 7.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🧺 Which of these is needed for the density tower? (a) a magnet (b) water with food colour (c) a mirror (d) a balloon
9. 9.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) sugar (c) a magnet (d) two clear glasses
10. 10.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is what we measure. (a) False (b) True
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the same window (b) the amount of water (c) brightness of rainbow
12. 12.🚀 Which of these goes backward? (a) the balloon (b) the rocket (c) air from the balloon (d) the rowing boat
13. 13.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same three liquids”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.True or false: cooking oil is needed for the density tower. (a) False (b) True
15. 15.🧺 Which of these is needed for the water cycle bowl? (a) yeast (b) a battery cell (c) ice cubes (d) a magnet
16. 16.🛟 Which of these floats on water? (a) a pebble (b) a metal key (c) an iron nail (d) an empty capped bottle
17. 17.🛟 Which scissors should children use to cut the paper? (a) a paper cutter (b) gardening shears (c) safety scissors (d) sharp kitchen shears
18. 18.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) faster (c) not at all (d) slower
19. 19.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) a balloon (c) a mirror (d) two chairs
21. 21.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) a pencil (c) a magnet (d) a paper clip
22. 22.True or false: honey is denser than water. (a) True (b) False
23. 23.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🌈 How many colours do we name in a rainbow (VIBGYOR)?
25. 25.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
26. 26.🔍 Which is the odd one out? (a) a plastic ruler (b) a piece of chalk (c) a steel spoon (d) a piece of foil
27. 27.🛟 Who should trim the flower stem? (a) a pet (b) a grown-up (c) anyone, without looking (d) a toddler
28. 28.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they separate again (c) they mix for ever (d) they become solid
29. 29.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) leave water on the floor (c) wipe up spills at once (d) run around the tub
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) a magnet (d) bright sunlight
31. 31.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) sawdust (d) glucose powder
32. 32.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is what we measure. (a) False (b) True
33. 33.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
34. 34.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same three liquids (b) the order of the layers (c) the order of pouring (d) how much of each liquid
35. 35.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is heavy (c) hot water is magnetic (d) hot water can scald
36. 36.🥄 Which of these dissolves in water? (a) sand (b) chalk powder (c) sugar (d) sawdust
37. 37.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same window (b) brightness of rainbow (c) the same glass (d) the amount of water
38. 38.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a glass of water (c) a magnet (d) a white flower
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is what we measure. (a) False (b) True

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