Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 351 · 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 a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to splash everyone (c) to hide the corks (d) to win a prize
2. 2.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we change it (b) we keep it the same (c) we measure it
3. 3.⚖️ 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 amount of water (b) the amount of colour (c) the length of the stem (d) time for colour to show
4. 4.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
5. 5.🚢 Why can a heavy steel ship float on the sea? (a) sea water is warm (b) its hollow shape (c) it has a magnet (d) steel is very light
6. 6.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) rain (b) lightning (c) sunshine (d) wind
7. 7.True or false: sweat drying on skin is evaporation. (a) False (b) True
8. 8.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a results table (c) a tub of water (d) a magnet
9. 9.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is what we measure. (a) True (b) False
10. 10.💧 Which change is this: a pond icing over? (a) condensation (b) freezing (c) melting (d) evaporation
11. 11.🧺 Which of these is needed for the dissolving test? (a) two clear glasses (b) a magnet (c) a mirror (d) honey
12. 12.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
13. 13.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
14. 14.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) cooking oil (c) water with food colour (d) turmeric powder
15. 15.🚀 Which of these goes forward? (a) water from the oars (b) air from the balloon (c) water a swimmer pushes (d) the rocket
16. 16.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the shape of the clay (b) the amount of clay (c) the tub of water (d) whether it floats
17. 17.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a medicine dropper
18. 18.🚁 Why does the paper helicopter fall slowly? (a) air pushes on its blades (b) the floor pushes it (c) it has no weight (d) a magnet holds it
19. 19.🧺 Which of these is not needed for the dissolving test? (a) warm water (b) two clear glasses (c) cold water (d) a magnet
20. 20.🌈 In VIBGYOR, what number colour is green?
21. 21.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) behind you (c) under the ground (d) in front of you
22. 22.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) cooking oil (c) a balloon (d) a tall clear glass
24. 24.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the slope of the string (b) distance it travels (c) the same string (d) the same tape
25. 25.True or false: a misty bathroom mirror is evaporation. (a) False (b) True
26. 26.⚖️ 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 change it (c) we keep it the same
27. 27.🥄 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a results table (c) a towel for spills (d) a balloon
29. 29.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is kept the same. (a) False (b) True
30. 30.🎈 Why does the balloon rocket move along the string? (a) a magnet pulls it (b) escaping air pushes it (c) the straw is heavy (d) the string pulls it
31. 31.True or false: a paper helicopter falls fast through the air. (a) True (b) False
32. 32.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a white flower (c) yeast (d) food colour
33. 33.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) cold water (c) warm water (d) a magnet
34. 34.🥄 Does powdered sugar dissolve faster or slower? (a) faster (b) slower
35. 35.🧺 Do we need a balloon for the dissolving test? (a) not needed (b) needed
36. 36.🔮 Predict: you fold the two blades the other way. What changes? (a) it spins the other way (b) it turns blue (c) it does not fall (d) it falls upward
37. 37.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
38. 38.🥄 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) baking soda (d) sawdust
39. 39.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) a balloon (c) a magnet (d) a battery cell
40. 40.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it turns into a kite (c) it can pop loudly (d) it changes colour

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