Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 589 · 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.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) prisms (d) clouds
2. 2.🌼 How does coloured water reach the petals? (a) it rains on them (b) through tiny stem tubes (c) through the air (d) it is sprayed on
3. 3.True or false: food colour is needed for the coloured flower experiment. (a) False (b) True
4. 4.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
5. 5.🧺 Do we need honey for the density tower? (a) needed (b) not needed
6. 6.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the cap is sticky (d) the bottle is magnetic
7. 7.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) sugar in icy water (d) powdered sugar
8. 8.🧺 Do we need vinegar for the balloon rocket? (a) needed (b) not needed
9. 9.True or false: yeast is needed for the coloured flower experiment. (a) True (b) False
10. 10.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) a magnet (c) food colour (d) a balloon
11. 11.True or false: a feather falls fast through the air. (a) True (b) False
12. 12.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) turmeric powder (d) a sheet of white paper
13. 13.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so the Sun moves (d) so it does not fall
14. 14.🍯 Is a ping-pong ball denser or less dense than water? (a) less dense than water (b) denser than water
15. 15.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is the one thing we change. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) a fluff of cotton (b) an open sheet of paper (c) a coin (d) a feather
17. 17.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) at the very bottom (c) in the oil layer (d) in the water layer
18. 18.True or false: a balloon is needed for the balloon rocket. (a) False (b) True
19. 19.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.💧 Which of these does not let water climb? (a) a cotton thread (b) a strip of cloth (c) a flower stem (d) a piece of foil
21. 21.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a towel (c) a balloon (d) a stiff postcard
23. 23.🌈 How many colours do we name in a rainbow (VIBGYOR)?
24. 24.🍯 Is cooking oil denser or less dense than water? (a) less dense than water (b) denser than water
25. 25.💧 Which of these is condensation? (a) wet clothes drying (b) wet hair drying (c) drops under a pot lid (d) making ice lollies
26. 26.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes forward (b) goes backward
27. 27.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) the sugar cube (c) neither of them (d) powdered sugar
28. 28.💧 Which change is this: a puddle drying up? (a) melting (b) evaporation (c) condensation (d) freezing
29. 29.True or false: sugar left unstirred dissolves faster. (a) False (b) True
30. 30.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the small pebble (b) both of them (c) neither of them (d) the big log
31. 31.💧 Which change is this: drops under a pot lid? (a) evaporation (b) freezing (c) condensation (d) melting
32. 32.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a magnetic pin holder (d) a fridge magnet
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) honey (c) a spoon (d) a balloon
34. 34.True or false: a paper clip is needed for the paper helicopter. (a) False (b) True
35. 35.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes forward (b) goes backward
36. 36.True or false: honey is less dense than water. (a) False (b) True
37. 37.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) some water evaporates (c) the water increases (d) it turns to ice
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is what we measure. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a magnetic pin holder (d) a suction hook
40. 40.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the amount of water (b) the water temperature (c) time to dissolve

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