Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 860 · 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.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
2. 2.🚢 Why can a heavy steel ship float on the sea? (a) sea water is warm (b) it has a magnet (c) steel is very light (d) its hollow shape
3. 3.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a magnet (d) a shadow of ice
4. 4.⚖️ 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
5. 5.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
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 way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is what we measure. (a) False (b) True
8. 8.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) sugar in warm water (d) sugar in icy water
9. 9.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it gets too heavy (c) it changes colour (d) it turns into a kite
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a towel (d) a balloon
11. 11.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the amount of clay (b) whether it floats (c) the shape of the clay (d) the kind of clay
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a stiff postcard (d) a magnet
13. 13.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a tub of water (c) a battery cell (d) a towel for spills
14. 14.🥄 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) a mirror (d) a clear glass of water
16. 16.True or false: the balloon goes forward. (a) True (b) False
17. 17.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes forward (b) goes backward
18. 18.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a glass marble (c) a steel spoon (d) a paper helicopter
19. 19.True or false: wet clothes drying is freezing. (a) True (b) False
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 kept the same. (a) False (b) True
21. 21.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it flies off the string (c) it turns into a kite (d) it goes much farther
22. 22.🔍 Which is the odd one out? (a) a piece of foil (b) a glass marble (c) a paper towel (d) a plastic ruler
23. 23.🛟 What should you do with wet floors after the experiment? (a) pour more water (b) slide on them (c) leave them wet (d) wipe them dry
24. 24.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🚀 Which of these goes forward? (a) gas from the rocket (b) air from the balloon (c) water from the oars (d) the rowing boat
26. 26.🚁 Which of these falls slowly through the air? (a) a stone (b) a steel spoon (c) a toy parachute (d) a crumpled paper ball
27. 27.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is the one thing we change. (a) True (b) False
28. 28.🧺 Which of these is needed for the balloon rocket? (a) vinegar (b) yeast (c) sticky tape (d) a mirror
29. 29.🥄 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) sand (d) sugar
30. 30.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) whether the card stays (b) the same card (c) the same glass (d) how full the glass is
31. 31.🧊 Why does an ice cube float on water? (a) ice is very cold (b) water is sticky (c) ice is magnetic (d) ice is less dense
32. 32.True or false: a magnet is not needed for the water cycle bowl. (a) True (b) False
33. 33.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is what we measure. (a) False (b) True
34. 34.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) a big bowl (c) water (d) turmeric powder
35. 35.True or false: a balloon is needed for the density tower. (a) True (b) False
36. 36.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) the rainbow fades (d) it floats away
37. 37.🧺 Which of these is not needed for the dissolving test? (a) a teaspoon (b) a magnet (c) cold water (d) sugar
38. 38.True or false: a pebble is denser than water. (a) True (b) False
39. 39.🎈 When does the balloon rocket stop? (a) it never stops (b) when it gets cold (c) when the air runs out (d) when it turns blue
40. 40.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they separate again (b) they mix for ever (c) they turn to honey (d) they become solid

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