Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 64 · 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.🧺 Which of these is needed for the paper helicopter? (a) yeast (b) a balloon (c) a magnet (d) a ruler
2. 2.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) small test objects (c) a towel for spills (d) a tub of water
3. 3.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a fridge magnet (b) a mirror (c) a sundial (d) a balloon rocket
4. 4.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🛟 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 hotter (d) it is magnetic
7. 7.🧺 Do we need cling film for the water cycle bowl? (a) not needed (b) needed
8. 8.True or false: a piece of foil does not let water climb. (a) True (b) False
9. 9.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it turns blue (c) it sinks (d) it melts
10. 10.🧺 Which of these is needed for the density tower? (a) turmeric powder (b) a balloon (c) yeast (d) water with food colour
11. 11.⚖️ 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) distance it travels (c) how big we blow it (d) the same tape
12. 12.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is heavier (c) oil is sticky (d) oil is less dense
13. 13.True or false: a big bowl is not needed for the water cycle bowl. (a) True (b) False
14. 14.True or false: a magnet is not needed for the density tower. (a) False (b) True
15. 15.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.True or false: a magnet is needed for the dissolving test. (a) False (b) True
17. 17.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) how full the glass is (b) the same card (c) the way we turn it (d) whether the card stays
18. 18.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a battery cell (c) a tall clear glass (d) water with food colour
19. 19.🧺 Do we need a pencil for the paper helicopter? (a) needed (b) not needed
20. 20.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) in the oil layer (c) on top of the oil (d) at the very bottom
21. 21.🧺 Which of these is not needed for the water cycle bowl? (a) sunlight (b) turmeric powder (c) ice cubes (d) cling film
22. 22.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is magnetic (d) the straw is hot
23. 23.🔍 Which is the odd one out? (a) honey (b) very salty water (c) a coin (d) an ice cube
24. 24.🚁 Which of these falls fast through the air? (a) a glass marble (b) an open sheet of paper (c) a toy parachute (d) a feather
25. 25.True or false: the swimmer goes forward. (a) True (b) False
26. 26.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) it stops in the air (c) it floats up (d) faster
28. 28.🥄 Which of these does not dissolve in water? (a) glucose powder (b) sand (c) table salt (d) food colour
29. 29.🧺 Which of these is not needed for the dissolving test? (a) honey (b) a clock or timer (c) sugar (d) two clear glasses
30. 30.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) safety scissors (d) a strip of paper
31. 31.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) a teaspoon (c) a mirror (d) warm water
32. 32.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
34. 34.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.⚖️ 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 measure it (c) we change it
36. 36.🧺 Do we need a spoon for the density tower? (a) needed (b) not needed
37. 37.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
38. 38.🧺 Do we need two chairs for the balloon rocket? (a) not needed (b) needed
39. 39.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) on top of the oil (c) in the honey layer (d) in the water layer
40. 40.True or false: air is denser than water. (a) True (b) False

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