Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 386 · 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.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) wipe them dry (c) pour more water (d) leave them wet
2. 2.🧺 Which of these is needed for the paper helicopter? (a) a balloon (b) safety scissors (c) a mirror (d) a magnet
3. 3.🌈 How many colours do we name in a rainbow (VIBGYOR)?
4. 4.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) the rainbow fades (d) it turns all red
5. 5.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the amount of water (c) the same glass
6. 6.⚖️ 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 order of the layers (b) the order of pouring (c) how much of each liquid (d) the same glass
7. 7.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.True or false: yeast is not needed for the float-or-sink test. (a) False (b) True
9. 9.🧺 Do we need a teaspoon for the dissolving test? (a) needed (b) not needed
10. 10.🚁 What does the paper helicopter do as it falls? (a) it turns into a ball (b) it flies upward (c) it stays still in air (d) it spins round
11. 11.🧺 Which of these is not needed for the dissolving test? (a) a balloon (b) two clear glasses (c) sugar (d) a clock or timer
12. 12.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a long string (c) sticky tape (d) vinegar
13. 13.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a fridge magnet (d) a drinking straw
14. 14.True or false: the rowing boat goes backward. (a) False (b) True
15. 15.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) capillary action (d) evaporation
16. 16.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) a magnet (c) a mirror (d) sticky tape
17. 17.True or false: a spoon is not needed for the density tower. (a) False (b) True
18. 18.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the stirring (b) the kind of sugar (c) the amount of water (d) time to dissolve
19. 19.True or false: turmeric powder is needed for the paper helicopter. (a) False (b) True
20. 20.⚖️ 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 the one thing we change. (a) True (b) False
21. 21.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) False (b) True
22. 22.True or false: a tub of water is needed for the float-or-sink test. (a) False (b) True
23. 23.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) hot water is magnetic (c) it changes colour (d) hot water can scald
25. 25.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
26. 26.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) not at all (c) faster (d) slower
27. 27.🛟 Does an ice-cream stick float or sink in water? (a) sinks (b) floats
28. 28.🛟 Which scissors should children use to cut the paper? (a) sharp kitchen shears (b) safety scissors (c) a paper cutter (d) gardening shears
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) True (b) False
30. 30.🛟 Which of these floats on water? (a) a cork (b) a metal key (c) a steel spoon (d) a glass marble
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.True or false: yeast is not needed for the coloured flower experiment. (a) False (b) True
34. 34.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) some water evaporates (c) the water increases (d) it turns to salt
35. 35.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it floats higher (c) it melts (d) it turns blue
36. 36.True or false: water a swimmer pushes goes backward. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sweat drying on skin (b) water becoming ice (c) making ice lollies (d) a pond icing over
38. 38.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) smell it closely (d) poke it with a finger
39. 39.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
40. 40.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) vinegar (c) a battery cell (d) a long string

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