Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 640 · 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.🍯 Is an ice cube denser or less dense than water? (a) less dense than water (b) denser than water
2. 2.📘 What is it called when water climbs up thin tubes or paper by itself? (a) capillary action (b) magnetism (c) melting (d) evaporation
3. 3.🧺 Which of these is needed for the density tower? (a) a tall clear glass (b) a balloon (c) yeast (d) a magnet
4. 4.True or false: table salt does not dissolve in water. (a) False (b) True
5. 5.🚢 Why can a heavy steel ship float on the sea? (a) its hollow shape (b) steel is very light (c) sea water is warm (d) it has a magnet
6. 6.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is the one thing we change. (a) True (b) False
7. 7.🍯 Why does honey sink to the bottom of the glass? (a) it is the stickiest (b) it is yellow (c) it is the coldest (d) it is the densest
8. 8.🧺 Which of these is needed for the float-or-sink test? (a) turmeric powder (b) a magnet (c) a battery cell (d) a results table
9. 9.⚖️ 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 measure it (b) we change it (c) we keep it the same
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 keep it the same (b) we change it (c) we measure it
11. 11.⚖️ 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 the one thing we change. (a) True (b) False
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a stiff postcard (d) a sink or a bucket
13. 13.🔮 A cork floats in tap water. What happens in very salty water? (a) it sinks (b) it dissolves (c) it still floats (d) it turns white
14. 14.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
15. 15.🧺 Do we need sugar for the dissolving test? (a) not needed (b) needed
16. 16.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
17. 17.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the shape of the clay (b) the kind of clay (c) the tub of water (d) whether it floats
19. 19.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
20. 20.True or false: a tub of water is not needed for the float-or-sink test. (a) True (b) False
21. 21.🧺 Do we need cling film for the water cycle bowl? (a) needed (b) not needed
22. 22.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) wipe up spills at once (c) leave water on the floor (d) play near a deep pond
23. 23.⚖️ 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 kept the same. (a) True (b) False
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) True (b) False
25. 25.🌈 How many colours do we name in a rainbow (VIBGYOR)?
26. 26.🧺 Do we need a mirror for the balloon rocket? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) water with food colour (c) a mirror (d) honey
28. 28.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) time to reach the floor (c) the paper clip
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is what we measure. (a) True (b) False
30. 30.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) on top of the oil (c) in the honey layer (d) in the water layer
31. 31.🧺 Which of these is not needed for the balloon rocket? (a) a battery cell (b) two chairs (c) a drinking straw (d) a long string
32. 32.True or false: a drinking straw works by magnetism. (a) True (b) False
33. 33.🔮 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 fall off at once (c) they all turn green (d) they turn two colours
34. 34.True or false: gas from the rocket goes forward. (a) False (b) True
35. 35.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) warm water (c) cotton wool (d) cold water
36. 36.True or false: cooking oil does not dissolve in water. (a) False (b) True
37. 37.True or false: yeast is needed for the water rainbow. (a) True (b) False
38. 38.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is the one thing we change. (a) True (b) False
39. 39.🔮 Predict: you blow the balloon up only a little. What happens? (a) it flies off the string (b) it goes less far (c) it turns into a kite (d) it goes much farther
40. 40.🔍 Which is the odd one out? (a) very salty water (b) a glass marble (c) a coin (d) cooking oil

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