Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 711 · 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.True or false: honey is not needed for the dissolving test. (a) False (b) True
2. 2.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
3. 3.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is kept the same. (a) False (b) True
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) a magnet
5. 5.⚖️ 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
6. 6.🧺 Which of these is needed for the density tower? (a) a balloon (b) a tall clear glass (c) yeast (d) a mirror
7. 7.🧺 Which of these is needed for the density tower? (a) water with food colour (b) a mirror (c) a battery cell (d) a magnet
8. 8.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) the rainbow fades (d) it turns brighter
9. 9.🧺 Do we need a strip of paper for the paper helicopter? (a) not needed (b) needed
10. 10.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the length of the blades (b) the drop height (c) the paper clip (d) time to reach the floor
11. 11.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is the one thing we change. (a) True (b) False
12. 12.🧺 Which of these is not needed for the water cycle bowl? (a) water (b) a battery cell (c) sunlight (d) a big bowl
13. 13.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a few hours of waiting (c) a mirror (d) a white flower
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is what we measure. (a) True (b) False
15. 15.True or false: a glass marble lets water climb up it. (a) True (b) False
16. 16.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) a pencil (c) a paper clip (d) a balloon
17. 17.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a mirror (b) a tall clear glass (c) cooking oil (d) water with food colour
18. 18.🧺 Do we need a balloon for the density tower? (a) needed (b) not needed
19. 19.🔍 What do you see after pouring honey, water and oil into one glass? (a) the glass gets hot (b) bubbles of gas (c) one mixed colour (d) three separate layers
20. 20.True or false: water with food colour is needed for the density tower. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a glass marble (c) a steel spoon (d) a paper helicopter
22. 22.True or false: a cork sinks in water. (a) True (b) False
23. 23.🥚 A fresh egg sinks in plain water. What makes it float? (a) a few ice cubes (b) lots of salt stirred in (c) more plain water (d) a little shaking
24. 24.⚖️ 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 keep it the same (c) we change it
25. 25.True or false: food colour does not dissolve in water. (a) False (b) True
26. 26.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a medicine dropper
27. 27.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the flat sheet (b) a sheet of glass (c) the crumpled ball (d) neither of them
28. 28.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass leaks (b) ice escapes the glass (c) the glass sweats (d) vapour in air cools
29. 29.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is kept the same. (a) False (b) True
30. 30.🧺 Do we need a magnet for the paper helicopter? (a) needed (b) not needed
31. 31.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) from your raised hand (c) a roof edge (d) a high window ledge
32. 32.🧺 Which of these is not needed for the density tower? (a) water with food colour (b) a tall clear glass (c) cooking oil (d) a battery cell
33. 33.True or false: a feather falls slowly through the air. (a) False (b) True
34. 34.⚖️ 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
35. 35.🌈 In VIBGYOR, what number colour is yellow?
36. 36.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a balloon (c) a magnet (d) a few hours of waiting
37. 37.⚖️ 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 length of the stem (b) time for colour to show (c) the room it stands in (d) the kind of flower
38. 38.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a battery cell (b) small test objects (c) a towel for spills (d) a results table
39. 39.🔮 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
40. 40.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) faster (b) they never dry (c) slower (d) they turn to ice

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