Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 1 · 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 of these is needed for the density tower? (a) a tall clear glass (b) turmeric powder (c) a mirror (d) a magnet
2. 2.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) whether it floats (b) the kind of clay (c) the shape of the clay
3. 3.🧺 Do we need turmeric powder for the water cycle bowl? (a) needed (b) not needed
4. 4.💧 Which of these is melting? (a) drops on a cold glass (b) dew on morning grass (c) wet hair drying (d) snow turning to water
5. 5.🛟 Who should trim the flower stem? (a) a toddler (b) a pet (c) a grown-up (d) anyone, without looking
6. 6.🌈 In VIBGYOR, what number colour is indigo?
7. 7.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the stem turns blue (c) the flower glows (d) the petals turn red
8. 8.🌦️ To see a rainbow in the sky, where must the Sun be? (a) behind you (b) straight above you (c) under the ground (d) in front of you
9. 9.🧺 Which of these is needed for the density tower? (a) cooking oil (b) a magnet (c) a balloon (d) a mirror
10. 10.🧺 Which of these is not needed for the water cycle bowl? (a) sunlight (b) a small cup (c) a big bowl (d) a balloon
11. 11.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it floats up (c) it settles at the bottom (d) it dissolves
12. 12.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the person dropping (b) the paper clip (c) time to reach the floor (d) the length of the blades
13. 13.🛟 What should you do with wet floors after the experiment? (a) pour more water (b) slide on them (c) leave them wet (d) wipe them dry
14. 14.🔍 Which is the odd one out? (a) dew on morning grass (b) making ice lollies (c) water becoming ice (d) a pond icing over
15. 15.True or false: a teaspoon is not needed for the dissolving test. (a) False (b) True
16. 16.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
17. 17.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) True (b) False
18. 18.🔍 You drop a coin into a tub of water. What do you see? (a) it dissolves (b) it bounces up (c) it floats (d) it sinks
19. 19.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is kept the same. (a) True (b) False
20. 20.🍯 Is a cork denser or less dense than water? (a) denser than water (b) less dense than water
21. 21.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they all turn green (c) they turn two colours (d) they fall off at once
22. 22.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (c) look at it in a mirror (d) never look at the Sun
23. 23.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is the one thing we change. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) a strip of cloth (b) a cotton thread (c) a paper towel (d) a piece of foil
25. 25.🥄 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🥄 Which of these does not dissolve in water? (a) baking soda (b) chalk powder (c) sugar (d) food colour
27. 27.True or false: a mirror is not needed for the balloon rocket. (a) False (b) True
28. 28.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.True or false: small pebbles dissolves in water. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a suction hook (d) a drinking straw
31. 31.🔮 Predict: you add two more paper clips. How does it fall? (a) faster (b) it floats up (c) it stops in the air (d) slower
32. 32.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) sand (d) water
33. 33.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) it stays still (c) forward (d) backward
34. 34.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) the water turns red (c) more drops form (d) the bowl freezes
35. 35.⚖️ 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
36. 36.🧺 Which of these is not needed for the density tower? (a) a spoon (b) honey (c) a tall clear glass (d) a magnet
37. 37.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals like colour (c) petals are magnetic (d) petals lose water to air
38. 38.🥄 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.📘 What does “dense” mean? (a) very hot (b) very thin (c) very colourful (d) heavy for its size
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is what we measure. (a) True (b) False

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