Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 447 · 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 not needed for the coloured flower experiment? (a) yeast (b) a glass of water (c) food colour (d) a white flower
2. 2.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.⚖️ 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 kind of paper (c) the drop height (d) time to reach the floor
4. 4.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) pour more water (c) slide on them (d) wipe them dry
6. 6.🌈 In VIBGYOR, what number colour is green?
7. 7.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes forward (b) goes backward
8. 8.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
9. 9.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) yeast (c) sticky tape (d) a balloon
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.⚖️ 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) True (b) False
13. 13.🔍 What do you see after pouring honey, water and oil into one glass? (a) the glass gets hot (b) bubbles of gas (c) three separate layers (d) one mixed colour
14. 14.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil makes it rain (c) oil attracts magnets (d) oil turns into honey
15. 15.True or false: a cork is less dense than water. (a) False (b) True
16. 16.🛟 Where is a safe place to drop the helicopter from? (a) a roof edge (b) a high window ledge (c) from your raised hand (d) a wobbly chair
17. 17.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the kind of clay (b) the shape of the clay (c) the amount of clay (d) the tub of water
18. 18.🥄 Does sugar left unstirred dissolve faster or slower? (a) slower (b) faster
19. 19.🔍 Which is the odd one out? (a) wet hair drying (b) making ice lollies (c) a puddle drying up (d) sweat drying on skin
20. 20.True or false: a balloon is not needed for the density tower. (a) True (b) False
21. 21.⚖️ 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) the same three liquids (b) the order of the layers (c) the order of pouring (d) how much of each liquid
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is kept the same. (a) True (b) False
24. 24.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
25. 25.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) powdered sugar (b) the sugar cube (c) neither of them (d) both the same
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) red (c) orange (d) violet
28. 28.🧺 Do we need honey for the dissolving test? (a) needed (b) not needed
29. 29.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a grown-up (c) a pet (d) a toddler
30. 30.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cotton wool (b) cold water (c) a teaspoon (d) a clock or timer
31. 31.🥄 Does sugar in icy water dissolve faster or slower? (a) slower (b) faster
32. 32.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
33. 33.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
34. 34.🧺 Do we need a tall clear glass for the density tower? (a) needed (b) not needed
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.🔍 Which is the odd one out? (a) a fluff of cotton (b) a toy parachute (c) an open sheet of paper (d) a glass marble
37. 37.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a long string (c) sticky tape (d) turmeric powder
38. 38.🧺 Do we need cooking oil for the density tower? (a) needed (b) not needed
39. 39.🥄 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.True or false: sticky tape is not needed for the balloon rocket. (a) True (b) False

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