Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 515 · 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.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
2. 2.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the flower floats away (c) the petals turn bluish (d) the stem turns to ice
3. 3.True or false: turmeric powder is needed for the balloon rocket. (a) False (b) True
4. 4.True or false: a piece of foil does not let water climb. (a) True (b) False
5. 5.🥄 Which of these dissolves in water? (a) sawdust (b) sand (c) cooking oil (d) glucose powder
6. 6.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) backward (b) forward (c) straight down (d) it stays still
7. 7.🚁 Dropped from a raised hand, does a toy parachute fall slowly or fast? (a) falls fast (b) falls slowly
8. 8.⚖️ 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 “how much of each liquid”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.True or false: a pebble is less dense than water. (a) False (b) True
10. 10.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) nothing ever happens (d) it sinks at once
12. 12.🛟 Why should only a grown-up handle any hot water? (a) hot water is magnetic (b) hot water can scald (c) it changes colour (d) hot water is heavy
13. 13.🔍 Which is the odd one out? (a) air (b) cooking oil (c) a coin (d) a ping-pong ball
14. 14.🌈 How many colours do we name in a rainbow (VIBGYOR)?
15. 15.🧺 Do we need a tub of water for the float-or-sink test? (a) needed (b) not needed
16. 16.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) from your raised hand (c) a roof edge (d) a wobbly chair
17. 17.🛟 Why should we wipe up spilled oil at once? (a) oil attracts magnets (b) oil makes it rain (c) spilled oil is slippery (d) oil turns into honey
18. 18.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) faster (b) slower (c) not at all (d) the same
19. 19.True or false: a mirror is not needed for the float-or-sink test. (a) True (b) False
20. 20.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it turns blue (c) it sinks (d) it floats higher
21. 21.⚖️ 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
22. 22.True or false: a mirror is needed for the dissolving test. (a) False (b) True
23. 23.⚖️ 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) time to reach the floor (d) the length of the blades
24. 24.True or false: a mirror is not needed for the paper helicopter. (a) False (b) True
25. 25.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) distance it travels (b) the same straw (c) the same tape (d) the slope of the string
27. 27.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.💧 Which change is this: making ice lollies? (a) evaporation (b) condensation (c) freezing (d) melting
29. 29.⚖️ 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) how many drops form (b) the time we wait (c) sun or shade (d) the size of the bowl
30. 30.True or false: small test objects is needed for the float-or-sink test. (a) True (b) False
31. 31.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the flower glows (d) the stem turns blue
32. 32.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it goes less far (c) it flies off the string (d) it turns into a kite
33. 33.True or false: honey is not needed for the density tower. (a) True (b) False
34. 34.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a towel for spills (c) a results table (d) a balloon
36. 36.🍯 Which of these is less dense than water? (a) a cork (b) honey (c) a glass marble (d) very salty water
37. 37.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
38. 38.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) True (b) False
40. 40.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a towel for spills (c) a results table (d) a mirror

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