Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 209 · 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.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a grown-up (d) a pet
2. 2.🌈 In VIBGYOR, what number colour is red?
3. 3.True or false: the swimmer goes backward. (a) True (b) False
4. 4.True or false: water with food colour is not needed for the density tower. (a) True (b) False
5. 5.📘 What pulls the paper helicopter down to the floor? (a) air pressure (b) magnetism (c) the wind (d) gravity
6. 6.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
7. 7.🎈 When does the balloon rocket stop? (a) when it turns blue (b) it never stops (c) when the air runs out (d) when it gets cold
8. 8.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the card stays on (d) the water turns to ice
9. 9.⚖️ 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 “the order of pouring”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) on top of the oil (c) in the honey layer (d) in the water layer
11. 11.⚖️ 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
12. 12.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🧺 Which of these is needed for the dissolving test? (a) honey (b) cold water (c) cotton wool (d) a mirror
14. 14.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it turns white (c) it sinks (d) it still floats
15. 15.⚖️ 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) how big we blow it (c) the slope of the string (d) the same string
16. 16.🧺 Which of these is not needed for the float-or-sink test? (a) a mirror (b) a towel for spills (c) a results table (d) a tub of water
17. 17.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) sea water is warm (c) it has a magnet (d) its hollow shape
18. 18.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) small pebbles (d) sawdust
20. 20.⚖️ 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
21. 21.True or false: a mirror is needed for the float-or-sink test. (a) False (b) True
22. 22.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to drops (b) it disappears (c) it turns to salt (d) it turns to smoke
23. 23.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
24. 24.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
25. 25.🔍 Which is the odd one out? (a) a pebble (b) air (c) honey (d) very salty water
26. 26.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes backward (b) goes forward
27. 27.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a suction hook
28. 28.🧺 Do we need a drinking straw for the balloon rocket? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the density tower? (a) a battery cell (b) a tall clear glass (c) a balloon (d) a mirror
30. 30.🍯 Is cooking oil denser or less dense than water? (a) less dense than water (b) denser than water
31. 31.🧺 Do we need a teaspoon for the dissolving test? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the balloon rocket? (a) a mirror (b) a drinking straw (c) a long string (d) a balloon
33. 33.🧺 Which of these is needed for the dissolving test? (a) a balloon (b) honey (c) cotton wool (d) sugar
34. 34.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
35. 35.🥚 A fresh egg sinks in plain water. What makes it float? (a) a few ice cubes (b) lots of salt stirred in (c) a little shaking (d) more plain water
36. 36.True or false: a battery cell is needed for the water cycle bowl. (a) True (b) False
37. 37.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) a balloon (c) sticky tape (d) a battery cell
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
40. 40.🔍 Which is the odd one out? (a) wet hair drying (b) a puddle drying up (c) wet clothes drying (d) drops under a pot lid

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