Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 951 · 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.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) escaping air pushes it (c) a magnet pulls it (d) the straw is heavy
2. 2.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil turns into honey (c) oil makes it rain (d) oil attracts magnets
3. 3.True or false: a medicine dropper works by air pressure. (a) True (b) False
4. 4.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
5. 5.True or false: a magnet is needed for the paper helicopter. (a) False (b) True
6. 6.🥄 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧺 Do we need turmeric powder for the float-or-sink test? (a) not needed (b) needed
8. 8.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sawdust (d) table salt
9. 9.⚖️ 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 what we measure. (a) True (b) False
10. 10.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is heavier (c) oil is hot (d) oil is less dense
12. 12.🛟 Who should trim the flower stem? (a) a toddler (b) anyone, without looking (c) a grown-up (d) a pet
13. 13.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a small rainbow (c) snow falling (d) a magnet
14. 14.🚀 Which of these goes forward? (a) water from the oars (b) gas from the rocket (c) water a swimmer pushes (d) the rowing boat
15. 15.💧 Which of these does not let water climb? (a) a sugar cube (b) a flower stem (c) a cotton thread (d) a glass marble
16. 16.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) air pushes on its blades (c) the floor pushes it (d) it has no weight
17. 17.🧺 Do we need honey for the density tower? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a tub of water (c) small test objects (d) a results table
19. 19.🔮 Predict: you add two more paper clips. How does it fall? (a) it stops in the air (b) faster (c) slower (d) it floats up
20. 20.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) warm water (c) a mirror (d) a clock or timer
21. 21.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a mirror (b) a balloon rocket (c) a sundial (d) a fridge magnet
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is the one thing we change. (a) True (b) False
24. 24.True or false: sugar in warm water dissolves slower. (a) True (b) False
25. 25.True or false: a cotton thread does not let water climb. (a) False (b) True
26. 26.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a sink or a bucket (c) a towel (d) a glass of water
27. 27.🔍 Which is the odd one out? (a) butter going runny (b) a misty bathroom mirror (c) snow turning to water (d) ice becoming water
28. 28.☀️ What is white sunlight really made of? (a) many colours mixed (b) tiny bits of dust (c) only yellow light (d) tiny drops of water
29. 29.True or false: yeast is needed for the density tower. (a) False (b) True
30. 30.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) sharp kitchen shears (c) safety scissors (d) a paper cutter
31. 31.True or false: sugar stirred well dissolves slower. (a) False (b) True
32. 32.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of pouring (b) the order of the layers (c) the same glass
33. 33.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
34. 34.🧺 Do we need a mirror for the density tower? (a) not needed (b) needed
35. 35.🍯 Which of these is denser than water? (a) an ice cube (b) very salty water (c) air (d) a ping-pong ball
36. 36.⚖️ 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 card (c) the same glass (d) the way we turn it
37. 37.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
38. 38.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is kept the same. (a) True (b) False
39. 39.True or false: small test objects is needed for the float-or-sink test. (a) False (b) True
40. 40.True or false: a compass needle works by air pressure. (a) False (b) True

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