Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 38 · 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 can scald (b) hot water is magnetic (c) it changes colour (d) hot water is heavy
2. 2.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) turmeric powder (c) a tub of water (d) small test objects
3. 3.True or false: a paper helicopter falls slowly through the air. (a) True (b) False
4. 4.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) petals are magnetic (c) the stem is hot (d) petals like colour
5. 5.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) yeast (c) cling film (d) a small cup
8. 8.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a tall clear glass (c) a mirror (d) a spoon
9. 9.🥄 Which of these dissolves in water? (a) food colour (b) chalk powder (c) cooking oil (d) sand
10. 10.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) both the same (c) powdered sugar (d) the sugar cube
11. 11.True or false: water from the oars goes forward. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a piece of thermocol (b) a ping-pong ball (c) a metal key (d) an empty capped bottle
13. 13.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.True or false: a battery cell is not needed for the balloon rocket. (a) False (b) True
15. 15.True or false: a paper helicopter falls fast through the air. (a) True (b) False
16. 16.🚁 Which of these falls fast through the air? (a) a glass marble (b) a fluff of cotton (c) an open sheet of paper (d) a toy parachute
17. 17.🛟 What should you do with popped balloon pieces? (a) throw them away safely (b) chew them (c) give them to a baby (d) keep them in your mouth
18. 18.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) no change at all (c) it goes faster (d) more friction, less far
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
20. 20.🧺 Do we need turmeric powder for the density tower? (a) needed (b) not needed
21. 21.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) slide on them (c) leave them wet (d) pour more water
22. 22.True or false: water becoming ice is freezing. (a) False (b) True
23. 23.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is kept the same. (a) False (b) True
24. 24.🚀 Which of these goes forward? (a) air from the balloon (b) water from the oars (c) the balloon (d) gas from the rocket
25. 25.True or false: snow turning to water is melting. (a) False (b) True
26. 26.🧺 Which of these is not needed for the float-or-sink test? (a) a results table (b) a tub of water (c) small test objects (d) a magnet
27. 27.True or false: a mirror is not needed for the float-or-sink test. (a) True (b) False
28. 28.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) yeast (d) a stiff postcard
31. 31.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) a balloon (c) a clock or timer (d) a teaspoon
32. 32.🧺 Do we need yeast for the density tower? (a) not needed (b) needed
33. 33.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) the slope of the string (c) the same tape (d) how big we blow it
34. 34.🧺 Do we need sugar for the dissolving test? (a) not needed (b) needed
35. 35.True or false: yeast is needed for the float-or-sink test. (a) False (b) True
36. 36.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) False (b) True
37. 37.💧 Which of these is evaporation? (a) dew on morning grass (b) water becoming ice (c) sweat drying on skin (d) drops under a pot lid
38. 38.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to keep children safe (c) to splash everyone (d) to win a prize
39. 39.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a white flower (c) turmeric powder (d) a balloon
40. 40.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed

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