Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 573 · 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.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
2. 2.True or false: baking soda dissolves in water. (a) True (b) False
3. 3.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the person dropping (b) time to reach the floor (c) the length of the blades (d) the paper clip
4. 4.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a battery cell (c) a spoon (d) honey
7. 7.🧺 Do we need a magnet for the paper helicopter? (a) needed (b) not needed
8. 8.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) air pressure (c) sunlight (d) friction
9. 9.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) yeast (c) a balloon (d) a tub of water
10. 10.🛟 How should you check if the sugar has dissolved? (a) taste it (b) poke it with a finger (c) look for leftover grains (d) smell it closely
11. 11.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same tape (b) the slope of the string (c) how big we blow it (d) the same string
12. 12.💧 Which of these lets water climb up it? (a) a paper towel (b) a glass marble (c) a rubber eraser (d) a plastic ruler
13. 13.True or false: food colour is needed for the coloured flower experiment. (a) False (b) True
14. 14.True or false: water from the oars goes forward. (a) False (b) True
15. 15.🥄 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) table salt (d) sand
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.⚖️ 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 kept the same. (a) False (b) True
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same glass (b) the way we turn it (c) whether the card stays (d) how full the glass is
19. 19.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
20. 20.🧺 Do we need a ruler for the paper helicopter? (a) needed (b) not needed
21. 21.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) in the oil layer (c) on top of the oil (d) in the water layer
22. 22.🔍 Which is the odd one out? (a) a cork (b) a ping-pong ball (c) a piece of thermocol (d) a pebble
23. 23.🍯 Which of these is less dense than water? (a) cooking oil (b) a glass marble (c) very salty water (d) a pebble
24. 24.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) yeast (c) food colour (d) a magnet
25. 25.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of the layers (b) the order of pouring (c) the same three liquids
26. 26.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
27. 27.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) sun or shade (b) the amount of water (c) the time we wait (d) how many drops form
28. 28.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) a balloon (c) yeast (d) a strip of paper
29. 29.True or false: a magnet is not needed for the float-or-sink test. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a piece of foil (b) a plastic ruler (c) a rubber eraser (d) a paper towel
31. 31.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) brightness of rainbow (c) the same white paper
32. 32.🧺 Do we need a spoon for the density tower? (a) needed (b) not needed
33. 33.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) air pushes it up (d) the straw is magnetic
34. 34.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is what we measure. (a) True (b) False
35. 35.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls slowly (b) falls fast
36. 36.🧺 Which of these is not needed for the float-or-sink test? (a) a battery cell (b) a tub of water (c) small test objects (d) a towel for spills
37. 37.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) the water increases (c) it turns to salt (d) some water evaporates
38. 38.⚖️ 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) False (b) True
39. 39.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
40. 40.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) sand (d) table salt

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