Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 433 · 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 needed for the water rainbow? (a) turmeric powder (b) yeast (c) a magnet (d) a sunny window
2. 2.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls slowly (b) falls fast
4. 4.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
5. 5.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) how full the glass is (b) whether the card stays (c) the same card
7. 7.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) a balloon (c) a magnet (d) a long string
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
9. 9.🔍 Which is the odd one out? (a) wet hair drying (b) a misty bathroom mirror (c) drops on a cold glass (d) drops under a pot lid
10. 10.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) hot water can scald (c) it changes colour (d) hot water is magnetic
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) yeast (c) a towel (d) turmeric powder
12. 12.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) some water evaporates (b) the water increases (c) it turns to ice (d) it turns to salt
13. 13.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a wobbly chair (c) from your raised hand (d) a roof edge
14. 14.🧺 Which of these is needed for the water cycle bowl? (a) cling film (b) a mirror (c) yeast (d) a balloon
15. 15.🌈 How many colours do we name in a rainbow (VIBGYOR)?
16. 16.True or false: a sheet of white paper is needed for the water rainbow. (a) True (b) False
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a towel (d) a stiff postcard
18. 18.🍯 Which of these is denser than water? (a) cooking oil (b) very salty water (c) air (d) a ping-pong ball
19. 19.⚖️ 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 stirring (c) the kind of sugar (d) the amount of water
20. 20.🧺 Do we need a mirror for the density tower? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a magnet (c) a sunny window (d) a sheet of white paper
22. 22.True or false: turmeric powder is needed for the paper helicopter. (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 “brightness of rainbow”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🚁 Why does the paper helicopter fall slowly? (a) the floor pushes it (b) a magnet holds it (c) it has no weight (d) air pushes on its blades
25. 25.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a clock or timer (c) cold water (d) a comb
26. 26.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the length of the blades (b) the kind of paper (c) the paper clip (d) the person dropping
27. 27.🧺 Which of these is not needed for the paper helicopter? (a) safety scissors (b) a pencil (c) a strip of paper (d) yeast
28. 28.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to hide the corks (c) to splash everyone (d) to win a prize
29. 29.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a medicine dropper
30. 30.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) True (b) False
31. 31.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) a big bowl (c) ice cubes (d) a magnet
32. 32.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a towel for spills (c) a results table (d) turmeric powder
33. 33.🛟 Does a glass marble float or sink in water? (a) sinks (b) floats
34. 34.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
35. 35.🥄 Does sugar in warm water dissolve faster or slower? (a) slower (b) faster
36. 36.🛟 Who should trim the flower stem? (a) a grown-up (b) anyone, without looking (c) a toddler (d) a pet
37. 37.🧺 Do we need cooking oil for the density tower? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) vinegar (c) a drinking straw (d) a balloon
39. 39.🛟 Which of these floats on water? (a) an iron nail (b) a dry leaf (c) a metal key (d) a steel spoon
40. 40.🔍 You drop a coin into a tub of water. What do you see? (a) it bounces up (b) it dissolves (c) it sinks (d) it floats

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