Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 971 · 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 should only a grown-up handle any hot water? (a) hot water is magnetic (b) hot water can scald (c) it changes colour (d) hot water is heavy
2. 2.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a tub of water (c) a results table (d) a magnet
3. 3.🔍 Which is the odd one out? (a) air (b) an ice cube (c) a cork (d) honey
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.⚖️ 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 amount of sugar (c) the water temperature (d) time to dissolve
6. 6.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is the one thing we change. (a) False (b) True
7. 7.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
9. 9.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) slide on them (c) wipe them dry (d) pour more water
10. 10.🛟 Does an ice cube float or sink in water? (a) floats (b) sinks
11. 11.🍯 Which of these is less dense than water? (a) very salty water (b) a pebble (c) a coin (d) cooking oil
12. 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is the one thing we change. (a) False (b) True
13. 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) whether it floats (c) the tub of water
14. 14.True or false: small test objects is not needed for the float-or-sink test. (a) True (b) False
15. 15.🔍 Sand is stirred into water. What do you see after a while? (a) it floats up (b) it dissolves (c) it settles at the bottom (d) it turns blue
16. 16.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) slower (b) the same (c) not at all (d) faster
17. 17.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it floats higher (c) it turns blue (d) it melts
18. 18.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) honey (c) cooking oil (d) turmeric powder
19. 19.🌈 How many colours do we name in a rainbow (VIBGYOR)?
20. 20.🧺 Which of these is needed for the density tower? (a) cooking oil (b) a mirror (c) a battery cell (d) yeast
21. 21.🍯 Which of these is less dense than water? (a) a coin (b) very salty water (c) honey (d) a cork
22. 22.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is what we measure. (a) False (b) True
23. 23.⚖️ 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
24. 24.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is the one thing we change. (a) False (b) True
25. 25.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) True (b) False
26. 26.💧 Which of these is melting? (a) a misty bathroom mirror (b) drops on a cold glass (c) snow turning to water (d) dew on morning grass
27. 27.⚖️ 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 kept the same. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) glucose powder (d) table salt
29. 29.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to keep children safe (d) to win a prize
30. 30.🍯 Which of these is less dense than water? (a) a glass marble (b) a pebble (c) a coin (d) an ice cube
31. 31.🔮 A cork floats in tap water. What happens in very salty water? (a) it sinks (b) it dissolves (c) it turns white (d) it still floats
32. 32.🛟 Does a ping-pong ball float or sink in water? (a) floats (b) sinks
33. 33.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) faster (c) it floats up (d) it stops in the air
34. 34.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) yeast (c) bright sunlight (d) turmeric powder
35. 35.🧺 Do we need honey for the density tower? (a) not needed (b) needed
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a towel (d) a stiff postcard
37. 37.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.True or false: sugar stirred well dissolves slower. (a) True (b) False
39. 39.🧺 Which of these is needed for the float-or-sink test? (a) a tub of water (b) turmeric powder (c) a balloon (d) a magnet
40. 40.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism

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