Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 374 · 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.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) True (b) False
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.True or false: a magnet is needed for the paper helicopter. (a) True (b) False
4. 4.🧺 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) a results table (d) small test objects
5. 5.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the slope of the string (b) the same tape (c) how big we blow it (d) the same string
6. 6.🧺 Which of these is not needed for the density tower? (a) honey (b) a spoon (c) water with food colour (d) a magnet
7. 7.🚀 Which of these goes forward? (a) air from the balloon (b) water from the oars (c) the rowing boat (d) gas from the rocket
8. 8.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a white flower (c) a balloon (d) a glass of water
9. 9.🎈 Why does the balloon rocket move along the string? (a) the straw is heavy (b) escaping air pushes it (c) the string pulls it (d) a magnet pulls it
10. 10.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) powdered sugar (b) both the same (c) neither of them (d) the sugar cube
11. 11.🔍 Which is the odd one out? (a) butter going runny (b) ice becoming water (c) snow turning to water (d) a puddle drying up
12. 12.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
13. 13.⚖️ 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
14. 14.💧 Which change is this: wet clothes drying? (a) freezing (b) condensation (c) evaporation (d) melting
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
16. 16.🚁 What does the paper helicopter do as it falls? (a) it spins round (b) it flies upward (c) it stays still in air (d) it turns into a ball
17. 17.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the kind of sugar (b) the stirring (c) the amount of water (d) time to dissolve
18. 18.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) on a bed (d) near a plug point
19. 19.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the water turns green (c) the flower floats away (d) the petals turn bluish
20. 20.True or false: a balloon is needed for the density tower. (a) True (b) False
21. 21.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a magnet (c) a spoon (d) cooking oil
22. 22.💧 Which change is this: dew on morning grass? (a) evaporation (b) freezing (c) condensation (d) melting
23. 23.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) it turns to salt (c) some water evaporates (d) the water increases
24. 24.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the big log (b) neither of them (c) both of them (d) the small pebble
25. 25.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a high window ledge (c) a wobbly chair (d) a roof edge
26. 26.⚖️ 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
27. 27.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) no change at all (c) less friction (d) more friction, less far
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a stiff postcard (d) a towel
29. 29.True or false: a mirror is not needed for the float-or-sink test. (a) False (b) True
30. 30.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) pour more water (c) slide on them (d) leave them wet
31. 31.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
32. 32.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) food colour (d) a magnet
33. 33.💧 Which change is this: drops under a pot lid? (a) melting (b) condensation (c) freezing (d) evaporation
34. 34.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) time to dissolve (b) the amount of water (c) the kind of sugar (d) the water temperature
36. 36.True or false: a steel spoon does not let water climb. (a) True (b) False
37. 37.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) sticky tape (c) a drinking straw (d) a battery cell
38. 38.True or false: a coin is less dense than water. (a) True (b) False
39. 39.🧺 Which of these is needed for the water cycle bowl? (a) turmeric powder (b) a big bowl (c) a magnet (d) a mirror
40. 40.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it

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