Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 63 · 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.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a tall clear glass (c) a mirror (d) a spoon
3. 3.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a mirror (b) a balloon rocket (c) a fridge magnet (d) a sundial
4. 4.🥚 A fresh egg sinks in plain water. What makes it float? (a) a few ice cubes (b) a little shaking (c) lots of salt stirred in (d) more plain water
5. 5.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we change it (b) we keep it the same (c) we measure it
6. 6.True or false: a bicycle pump works by magnetism. (a) False (b) True
7. 7.⚖️ 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) False (b) True
8. 8.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is the one thing we change. (a) True (b) False
9. 9.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it changes colour (c) it turns into a kite (d) it gets too heavy
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.True or false: air is denser than water. (a) True (b) False
12. 12.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) the water increases (c) some water evaporates (d) it turns to ice
13. 13.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) brightness of rainbow (b) the time of day (c) the same glass (d) the amount of water
15. 15.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🔍 Which is the odd one out? (a) wet clothes drying (b) wet hair drying (c) sweat drying on skin (d) water becoming ice
17. 17.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the amount of water
18. 18.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
19. 19.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) a strip of paper (d) safety scissors
20. 20.🧺 Do we need yeast for the balloon rocket? (a) not needed (b) needed
21. 21.True or false: sand dissolves in water. (a) False (b) True
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is the one thing we change. (a) False (b) True
23. 23.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🧺 Do we need a long string for the balloon rocket? (a) needed (b) not needed
25. 25.⚖️ 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) the same glass (c) the way we turn it (d) the same card
26. 26.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
27. 27.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they turn to honey (c) they separate again (d) they mix for ever
28. 28.🧺 Which of these is needed for the dissolving test? (a) a magnet (b) cotton wool (c) honey (d) cold water
29. 29.🚁 Which of these falls fast through the air? (a) a glass marble (b) a feather (c) an open sheet of paper (d) a paper helicopter
30. 30.True or false: small test objects is needed for the float-or-sink test. (a) False (b) True
31. 31.💧 Which of these is melting? (a) drops on a cold glass (b) a misty bathroom mirror (c) wet clothes drying (d) butter going runny
32. 32.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.💧 Which of these is condensation? (a) making ice lollies (b) a puddle drying up (c) water becoming ice (d) drops on a cold glass
34. 34.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) air (b) a pebble (c) a cork (d) cooking oil
36. 36.🎈 What is the job of the straw on the string? (a) it guides the balloon (b) it blows air in (c) it makes it heavier (d) it holds water
37. 37.⚖️ 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
38. 38.🌈 How many colours do we name in a rainbow (VIBGYOR)?
39. 39.🧺 Do we need safety scissors for the paper helicopter? (a) needed (b) not needed
40. 40.🚁 Which of these falls fast through the air? (a) a fluff of cotton (b) a crumpled paper ball (c) a feather (d) an open sheet of paper

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