Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 926 · 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 rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it in a mirror (d) look at it through glass
2. 2.🧺 Do we need a battery cell for the balloon rocket? (a) not needed (b) needed
3. 3.🧺 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) small test objects (d) a results table
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a sink or a bucket (d) a stiff postcard
5. 5.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the room it stands in (b) the kind of flower (c) the length of the stem (d) the amount of colour
6. 6.🧺 Which of these is needed for the dissolving test? (a) two clear glasses (b) a magnet (c) honey (d) a comb
7. 7.💧 Which of these does not let water climb? (a) a glass marble (b) a flower stem (c) a piece of chalk (d) a strip of cloth
8. 8.🔍 Which is the odd one out? (a) drops on a cold glass (b) drops under a pot lid (c) a misty bathroom mirror (d) wet hair drying
9. 9.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a spoon (c) honey (d) a magnet
10. 10.🥄 Does sugar in warm water dissolve faster or slower? (a) slower (b) faster
11. 11.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) it has no weight (c) air pushes on its blades (d) the floor pushes it
12. 12.True or false: sugar does not dissolve in water. (a) True (b) False
13. 13.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
14. 14.⚖️ 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 change it (c) we measure it
15. 15.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
16. 16.📘 What does “dense” mean? (a) very colourful (b) heavy for its size (c) very hot (d) very thin
17. 17.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) honey (c) a spoon (d) yeast
18. 18.🧺 Do we need a magnet for the water cycle bowl? (a) not needed (b) needed
19. 19.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
20. 20.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is hot (d) oil is sticky
21. 21.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) how many drops form (b) sun or shade (c) the cling film cover (d) the time we wait
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) how full the glass is (b) the same glass (c) the way we turn it (d) the same card
23. 23.🧺 Which of these is not needed for the density tower? (a) a tall clear glass (b) a battery cell (c) water with food colour (d) honey
24. 24.True or false: butter going runny is melting. (a) True (b) False
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we keep it the same (b) we measure it (c) we change it
26. 26.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) safety scissors (c) a mirror (d) a ruler
27. 27.True or false: turmeric powder is needed for the coloured flower experiment. (a) False (b) True
28. 28.⚖️ 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 measure it (b) we change it (c) we keep it the same
29. 29.🧺 Do we need a comb for the dissolving test? (a) needed (b) not needed
30. 30.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) wipe up spills at once (c) run around the tub (d) play near a deep pond
31. 31.True or false: cold water is not needed for the dissolving test. (a) False (b) True
32. 32.🚁 What does the paper helicopter do as it falls? (a) it spins round (b) it stays still in air (c) it turns into a ball (d) it flies upward
33. 33.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a clock or timer (c) a comb (d) sugar
34. 34.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) how big we blow it (b) the slope of the string (c) the same string (d) distance it travels
35. 35.🌈 How many colours do we name in a rainbow (VIBGYOR)?
36. 36.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) the time we wait (b) the size of the bowl (c) the amount of water (d) how many drops form
37. 37.🌈 In VIBGYOR, what number colour is violet?
38. 38.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) True (b) False
39. 39.True or false: yeast is needed for the float-or-sink test. (a) False (b) True
40. 40.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed

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