Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 113 · 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 card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a magnet (d) a mirror
2. 2.🔍 Which is the odd one out? (a) a pebble (b) very salty water (c) cooking oil (d) a coin
3. 3.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
4. 4.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a balloon (b) ice cubes (c) cling film (d) a big bowl
5. 5.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the kind of flower (b) the length of the stem (c) the amount of water (d) time for colour to show
6. 6.🧺 Which of these is needed for the density tower? (a) yeast (b) a mirror (c) turmeric powder (d) water with food colour
7. 7.⚖️ 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) the time we wait (b) the size of the bowl (c) how many drops form (d) the amount of water
8. 8.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
9. 9.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) do not lick the spoon (c) throw the glass (d) taste each layer
10. 10.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) it sinks at once (d) nothing ever happens
11. 11.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same glass is what we measure. (a) True (b) False
12. 12.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) turmeric powder (c) yeast (d) a mirror
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to stop the spinning (b) to make it fall slower (c) to weigh down the bottom (d) to make it magnetic
15. 15.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) no colour change (d) the petals turn red
16. 16.⚖️ 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
17. 17.True or false: a mirror is not needed for the paper helicopter. (a) False (b) True
18. 18.🧺 Do we need a battery cell for the density tower? (a) not needed (b) needed
19. 19.True or false: a steel spoon falls slowly through the air. (a) True (b) False
20. 20.🛟 Which of these sinks in water? (a) a dry leaf (b) a ping-pong ball (c) an empty capped bottle (d) a glass marble
21. 21.💧 Which change is this: snow turning to water? (a) evaporation (b) condensation (c) melting (d) freezing
22. 22.🔍 Which is the odd one out? (a) baking soda (b) sand (c) chalk powder (d) small pebbles
23. 23.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is magnetic (d) it is hotter
24. 24.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a roof edge (c) a wobbly chair (d) from your raised hand
25. 25.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a magnet (d) a clear glass of water
26. 26.True or false: a mirror is not needed for the dissolving test. (a) True (b) False
27. 27.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it goes much farther (c) it flies off the string (d) it goes less far
28. 28.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it gets hot (c) so it turns blue (d) so it does not fall
29. 29.🧺 Do we need cooking oil for the density tower? (a) not needed (b) needed
30. 30.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is kept the same. (a) False (b) True
31. 31.🛟 What should you do with popped balloon pieces? (a) give them to a baby (b) keep them in your mouth (c) throw them away safely (d) chew them
32. 32.🧺 Do we need honey for the density tower? (a) not needed (b) needed
33. 33.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the water layer (c) in the honey layer (d) on top of the oil
34. 34.True or false: water a swimmer pushes goes forward. (a) False (b) True
35. 35.True or false: the rowing boat goes forward. (a) True (b) False
36. 36.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a results table (c) a tub of water (d) yeast
37. 37.True or false: a steel spoon falls fast through the air. (a) True (b) False
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a towel (d) a mirror
39. 39.True or false: an empty capped bottle sinks in water. (a) True (b) False
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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