Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 124 · 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.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
2. 2.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🔍 Which is the odd one out? (a) a metal key (b) a coin (c) a steel spoon (d) a piece of thermocol
4. 4.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) honey (c) cooking oil (d) turmeric powder
5. 5.🧺 Which of these is needed for the float-or-sink test? (a) turmeric powder (b) a mirror (c) a balloon (d) a towel for spills
6. 6.🛟 Does a steel spoon float or sink in water? (a) floats (b) sinks
7. 7.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it dissolves (c) it settles at the bottom (d) it floats up
8. 8.🍯 Is a cork denser or less dense than water? (a) denser than water (b) less dense than water
9. 9.🧺 Which of these is needed for the float-or-sink test? (a) yeast (b) small test objects (c) a balloon (d) a magnet
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
12. 12.True or false: a balloon is not needed for the paper helicopter. (a) True (b) False
13. 13.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) a balloon (c) a few hours of waiting (d) a mirror
14. 14.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.🔍 Which is the odd one out? (a) making ice lollies (b) dew on morning grass (c) a misty bathroom mirror (d) drops on a cold glass
16. 16.🌈 In VIBGYOR, what number colour is orange?
17. 17.True or false: safety scissors is not needed for the paper helicopter. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) cooking oil (b) a glass marble (c) a pebble (d) honey
19. 19.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) the water increases (c) some water evaporates (d) it turns to salt
20. 20.🛟 What should you do after handling food colour? (a) lick your fingers (b) rub your eyes (c) wipe them on walls (d) wash your hands
21. 21.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward
22. 22.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes backward (b) goes forward
23. 23.🛟 Who should trim the flower stem? (a) a toddler (b) a grown-up (c) a pet (d) anyone, without looking
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) whether the card stays (b) how full the glass is (c) the way we turn it (d) the same glass
25. 25.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to hide the corks (c) to win a prize (d) to keep children safe
26. 26.🧺 Do we need a results table for the float-or-sink test? (a) needed (b) not needed
27. 27.True or false: a ball of clay sinks in water. (a) True (b) False
28. 28.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar in warm water (c) sugar left unstirred (d) sugar stirred well
29. 29.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) False (b) True
30. 30.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.True or false: a paper towel does not let water climb. (a) True (b) False
32. 32.True or false: a mirror is needed for the float-or-sink test. (a) True (b) False
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a balloon (d) a glass of water
34. 34.True or false: an open sheet of paper falls slowly through the air. (a) True (b) False
35. 35.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it floats higher (c) it sinks (d) it turns blue
36. 36.🔍 Which is the odd one out? (a) a crumpled paper ball (b) an open sheet of paper (c) a stone (d) a glass marble
37. 37.⚖️ 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 order of the layers (b) the same three liquids (c) how much of each liquid (d) the order of pouring
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) a towel (d) a sink or a bucket
39. 39.🧺 Do we need a battery cell for the balloon rocket? (a) not needed (b) needed
40. 40.True or false: a suction hook works by air pressure. (a) True (b) False

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