Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 225 · 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.🥄 Does sugar left unstirred dissolve faster or slower? (a) faster (b) slower
2. 2.🧺 Do we need a drinking straw for the balloon rocket? (a) needed (b) not needed
3. 3.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.True or false: a dry leaf floats on water. (a) True (b) False
5. 5.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
6. 6.🛟 Which scissors should children use to cut the paper? (a) safety scissors (b) sharp kitchen shears (c) a paper cutter (d) gardening shears
7. 7.🌈 How many colours do we name in a rainbow (VIBGYOR)?
8. 8.🥄 Does powdered sugar dissolve faster or slower? (a) faster (b) slower
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a few hours of waiting (c) turmeric powder (d) a glass of water
10. 10.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
11. 11.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) how much of each liquid (b) the order of pouring (c) the same three liquids (d) the same glass
12. 12.🧺 Do we need a magnet for the water cycle bowl? (a) needed (b) not needed
13. 13.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
14. 14.True or false: water from the oars goes backward. (a) False (b) True
15. 15.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) the rainbow fades (c) it floats away (d) it turns brighter
16. 16.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) cooking oil (c) a spoon (d) a battery cell
17. 17.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a clear glass of water (d) yeast
19. 19.💧 In the covered bowl, where does the water vapour come from? (a) water warmed by the Sun (b) the bowl itself (c) the cling film (d) the air outside
20. 20.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for the density tower? (a) yeast (b) a battery cell (c) water with food colour (d) a balloon
22. 22.🔍 Which is the odd one out? (a) an ice cube (b) a cork (c) a dry leaf (d) a metal key
23. 23.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) throw the glass (c) do not lick the spoon (d) taste each layer
24. 24.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🧺 Do we need a big bowl for the water cycle bowl? (a) not needed (b) needed
26. 26.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a balloon (c) turmeric powder (d) a magnet
27. 27.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through the air (c) through tiny stem tubes (d) it rains on them
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a battery cell (d) a towel
29. 29.🧺 Do we need yeast for the paper helicopter? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the dissolving test? (a) a mirror (b) cotton wool (c) cold water (d) a magnet
31. 31.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the water turns solid (b) all of it dissolves (c) some stays undissolved (d) the sugar turns to salt
32. 32.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the dissolving test? (a) sugar (b) a clock or timer (c) cold water (d) a mirror
34. 34.⚖️ 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) the same tape (c) how big we blow it (d) distance it travels
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is the one thing we change. (a) True (b) False
36. 36.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) yeast (d) a glass of water
37. 37.🧺 Which of these is needed for the dissolving test? (a) a magnet (b) warm water (c) honey (d) a balloon
38. 38.🧺 Which of these is needed for the float-or-sink test? (a) small test objects (b) a magnet (c) turmeric powder (d) a mirror
39. 39.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) the paper clip (c) time to reach the floor
40. 40.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a battery cell (b) a balloon (c) a drinking straw (d) a long string

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