Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 128 · 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 mirror for the coloured flower experiment? (a) not needed (b) needed
2. 2.🥄 Does sugar in warm water dissolve faster or slower? (a) slower (b) faster
3. 3.🥄 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🍯 Is a pebble denser or less dense than water? (a) denser than water (b) less dense than water
5. 5.🚁 What does the paper helicopter do as it falls? (a) it turns into a ball (b) it flies upward (c) it spins round (d) it stays still in air
6. 6.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) taste it (c) look for leftover grains (d) poke it with a finger
7. 7.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a paper clip (c) a ruler (d) a battery cell
8. 8.🧺 Do we need water with food colour for the density tower? (a) not needed (b) needed
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same tape (b) the same straw (c) how big we blow it (d) the slope of the string
10. 10.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) slower (c) it stops in the air (d) faster
11. 11.True or false: a long string is not needed for the balloon rocket. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) a bicycle pump (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
13. 13.🧺 Do we need a strip of paper for the paper helicopter? (a) not needed (b) needed
14. 14.🚁 Why does the paper helicopter fall slowly? (a) air pushes on its blades (b) it has no weight (c) a magnet holds it (d) the floor pushes it
15. 15.🔍 Which is the odd one out? (a) a plastic ruler (b) a cotton thread (c) a piece of chalk (d) a strip of cloth
16. 16.🧺 Do we need turmeric powder for the density tower? (a) not needed (b) needed
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is kept the same. (a) False (b) True
18. 18.True or false: a tub of water is needed for the float-or-sink test. (a) False (b) True
19. 19.True or false: a magnet is needed for the dissolving test. (a) False (b) True
20. 20.🚁 Which of these falls slowly through the air? (a) a toy parachute (b) a crumpled paper ball (c) a stone (d) a glass marble
21. 21.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
22. 22.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a balloon (c) a results table (d) a towel for spills
23. 23.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a roof edge (c) a wobbly chair (d) a high window ledge
25. 25.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
26. 26.True or false: air from the balloon goes forward. (a) False (b) True
27. 27.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the water turns red (b) fewer drops form (c) the bowl freezes (d) more drops form
28. 28.🛟 Which of these floats on water? (a) an iron nail (b) a ball of clay (c) a glass marble (d) an ice cube
29. 29.True or false: a pebble sinks in water. (a) True (b) False
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) True (b) False
31. 31.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a magnet (c) a small rainbow (d) a shadow of ice
32. 32.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
33. 33.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.True or false: sugar in warm water dissolves faster. (a) False (b) True
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) whether it floats (c) the kind of clay
36. 36.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
37. 37.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is what we measure. (a) False (b) True
40. 40.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we keep it the same (b) we measure it (c) we change it

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