Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 745 · 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 is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) the card gets wet (d) little air left inside
2. 2.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is the one thing we change. (a) True (b) False
3. 3.True or false: a magnet is not needed for the float-or-sink test. (a) False (b) True
4. 4.🌈 In VIBGYOR, what number colour is yellow?
5. 5.🔮 A cork floats in tap water. What happens in very salty water? (a) it sinks (b) it dissolves (c) it still floats (d) it turns white
6. 6.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the flower glows (d) the stem turns blue
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🚁 Which of these falls fast through the air? (a) a fluff of cotton (b) a toy parachute (c) an open sheet of paper (d) a glass marble
9. 9.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the amount of colour
10. 10.⚖️ 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 the one thing we change. (a) False (b) True
11. 11.True or false: a piece of thermocol floats on water. (a) True (b) False
12. 12.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same glass (b) brightness of rainbow (c) the same white paper (d) the amount of water
13. 13.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) yeast (c) a balloon (d) a drinking straw
14. 14.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
15. 15.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
16. 16.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
17. 17.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the paper clip (b) the drop height (c) time to reach the floor (d) the length of the blades
18. 18.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of pouring”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.🌈 How many colours do we name in a rainbow (VIBGYOR)?
20. 20.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
21. 21.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) a battery cell (c) a pencil (d) a magnet
22. 22.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) True (b) False
23. 23.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is the one thing we change. (a) True (b) False
24. 24.💧 In the covered bowl, where does the water vapour come from? (a) the air outside (b) water warmed by the Sun (c) the bowl itself (d) the cling film
25. 25.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) a balloon (c) ice cubes (d) a big bowl
26. 26.🌊 What pushes a floating cork upward? (a) the tub (b) the water (c) the cork itself (d) the air above
27. 27.🔍 What do you see after pouring honey, water and oil into one glass? (a) three separate layers (b) one mixed colour (c) the glass gets hot (d) bubbles of gas
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a battery cell
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) False (b) True
30. 30.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is kept the same. (a) False (b) True
31. 31.🥄 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) run around the tub (c) leave water on the floor (d) play near a deep pond
33. 33.True or false: a results table is needed for the float-or-sink test. (a) False (b) True
34. 34.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar stirred well (c) sugar in warm water (d) sugar left unstirred
35. 35.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it gets hot (c) so it does not fall (d) so it turns blue
36. 36.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same straw (b) the same tape (c) the slope of the string (d) distance it travels
37. 37.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a spoon (c) cooking oil (d) a magnet
38. 38.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it can pop loudly (c) it gets too heavy (d) it turns into a kite
39. 39.🛟 Why should we wipe up spilled oil at once? (a) oil attracts magnets (b) oil turns into honey (c) spilled oil is slippery (d) oil makes it rain
40. 40.🔍 Which is the odd one out? (a) drops on a cold glass (b) a misty bathroom mirror (c) a pond icing over (d) dew on morning grass

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