Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 287 · 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 density tower? (a) a mirror (b) water with food colour (c) a magnet (d) turmeric powder
2. 2.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes backward (b) goes forward
3. 3.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.True or false: a rubber eraser does not let water climb. (a) True (b) False
5. 5.💧 Which of these is freezing? (a) making ice lollies (b) wet hair drying (c) ice becoming water (d) a puddle drying up
6. 6.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) both the same (c) powdered sugar (d) neither of them
7. 7.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is the one thing we change. (a) False (b) True
8. 8.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) look for leftover grains (c) taste it (d) poke it with a finger
9. 9.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) sun or shade (b) the size of the bowl (c) how many drops form (d) the time we wait
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is what we measure. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a drinking straw (c) sticky tape (d) vinegar
13. 13.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a towel for spills (c) small test objects (d) a balloon
14. 14.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed
15. 15.⚖️ 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 the layers (c) the same glass (d) the order of pouring
16. 16.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a balloon (d) a sunny window
17. 17.True or false: water a swimmer pushes goes backward. (a) True (b) False
18. 18.True or false: a battery cell is not needed for the balloon rocket. (a) True (b) False
19. 19.True or false: yeast is not needed for the float-or-sink test. (a) True (b) False
20. 20.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) in the honey layer (c) under the honey (d) on top of the oil
21. 21.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) a paper clip (c) a pencil (d) a battery cell
22. 22.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a ruler (c) a mirror (d) safety scissors
23. 23.🔍 Which is the odd one out? (a) a feather (b) a stone (c) a fluff of cotton (d) a paper helicopter
24. 24.🔍 Which is the odd one out? (a) a dry leaf (b) an iron nail (c) a piece of thermocol (d) an empty capped bottle
25. 25.True or false: a drinking straw works by air pressure. (a) True (b) False
26. 26.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) play near a deep pond (c) wipe up spills at once (d) run around the tub
28. 28.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
29. 29.🧺 Which of these is not needed for the water rainbow? (a) turmeric powder (b) bright sunlight (c) a sheet of white paper (d) a clear glass of water
30. 30.🔍 Which is the odd one out? (a) cooking oil (b) a cork (c) a coin (d) an ice cube
31. 31.True or false: a magnet is needed for the dissolving test. (a) True (b) False
32. 32.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) do not lick the spoon (c) throw the glass (d) taste each layer
33. 33.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) sugar (d) baking soda
34. 34.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it turns blue (c) so it gets hot (d) so the Sun moves
35. 35.🛟 Who should trim the flower stem? (a) a grown-up (b) a pet (c) a toddler (d) anyone, without looking
36. 36.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True
38. 38.💧 Which of these lets water climb up it? (a) a glass marble (b) a rubber eraser (c) a cotton thread (d) a plastic ruler
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card stays on (c) the water turns to ice (d) the card flies away

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