Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 455 · 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 is the odd one out? (a) a glass marble (b) a steel spoon (c) a stone (d) a paper helicopter
2. 2.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
3. 3.True or false: honey is not needed for the density tower. (a) False (b) True
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
6. 6.True or false: wet hair drying is melting. (a) True (b) False
7. 7.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same three liquids (b) the order of pouring (c) the same glass (d) how much of each liquid
8. 8.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) True (b) False
9. 9.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a long string (c) vinegar (d) a balloon
10. 10.True or false: air is denser than water. (a) False (b) True
11. 11.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) a balloon (c) a clock or timer (d) a teaspoon
12. 12.🛟 How should you check if the sugar has dissolved? (a) poke it with a finger (b) taste it (c) look for leftover grains (d) smell it closely
13. 13.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is what we measure. (a) True (b) False
14. 14.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) it sinks at once (c) nothing ever happens (d) colour climbs up it
15. 15.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is what we measure. (a) True (b) False
17. 17.🛟 Which of these sinks in water? (a) an ice cube (b) a cork (c) a feather (d) a coin
18. 18.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) escaping air pushes it (c) the straw is heavy (d) a magnet pulls it
19. 19.🧺 Which of these is needed for the paper helicopter? (a) safety scissors (b) a magnet (c) yeast (d) a balloon
20. 20.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
21. 21.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a magnet (c) a few hours of waiting (d) a white flower
22. 22.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) forward (c) it stays still (d) backward
23. 23.💧 Which change is this: making ice lollies? (a) condensation (b) evaporation (c) melting (d) freezing
24. 24.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to hide the corks (c) to splash everyone (d) to win a prize
25. 25.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) small pebbles (d) food colour
26. 26.True or false: water from the oars goes forward. (a) True (b) False
27. 27.🌈 How many colours do we name in a rainbow (VIBGYOR)?
28. 28.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) sawdust (d) cooking oil
29. 29.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
30. 30.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a roof edge (c) a high window ledge (d) from your raised hand
31. 31.True or false: gas from the rocket goes backward. (a) False (b) True
32. 32.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is kept the same. (a) False (b) True
33. 33.🧺 Do we need a tall clear glass for the density tower? (a) needed (b) not needed
34. 34.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a magnet (c) turmeric powder (d) a glass of water
35. 35.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.True or false: a battery cell is not needed for the float-or-sink test. (a) True (b) False
37. 37.🧺 Do we need yeast for the paper helicopter? (a) needed (b) not needed
38. 38.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🔍 Which is the odd one out? (a) ice becoming water (b) butter going runny (c) water becoming ice (d) snow turning to water

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