Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 720 · 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 dissolving test? (a) a mirror (b) a teaspoon (c) a magnet (d) a comb
2. 2.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) faster (c) it floats up (d) it stops in the air
3. 3.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is kept the same. (a) False (b) True
5. 5.🥄 Does sugar in warm water dissolve faster or slower? (a) faster (b) slower
6. 6.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🔍 You drop a coin into a tub of water. What do you see? (a) it sinks (b) it bounces up (c) it dissolves (d) it floats
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a magnet (d) a towel
9. 9.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a sunny window (c) yeast (d) a magnet
10. 10.True or false: a cork floats on water. (a) False (b) True
11. 11.🧺 Which of these is needed for the float-or-sink test? (a) a balloon (b) a magnet (c) a results table (d) a battery cell
12. 12.🛟 Which of these floats on water? (a) an ice-cream stick (b) a metal key (c) a coin (d) a pebble
13. 13.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) time to reach the floor (b) the person dropping (c) the length of the blades
14. 14.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) small pebbles (d) food colour
15. 15.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) small pebbles (d) food colour
16. 16.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it sinks at once (c) it turns to plastic (d) colour climbs up it
17. 17.🚁 Which of these falls slowly through the air? (a) a steel spoon (b) a coin (c) a crumpled paper ball (d) a paper helicopter
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) whether the card stays (b) the same card (c) the same glass (d) the way we turn it
19. 19.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so the Sun moves (d) so it turns blue
20. 20.🧺 Do we need a battery cell for the paper helicopter? (a) not needed (b) needed
21. 21.True or false: sugar stirred well dissolves slower. (a) True (b) False
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.🧺 Which of these is needed for the water cycle bowl? (a) a balloon (b) water (c) a magnet (d) a battery cell
24. 24.🔍 Which is the odd one out? (a) a coin (b) an ice-cream stick (c) a metal key (d) a pebble
25. 25.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) neither of them (b) the flat sheet (c) a sheet of glass (d) the crumpled ball
26. 26.⚖️ 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 glass (b) the order of the layers (c) the order of pouring (d) the same three liquids
27. 27.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) a balloon (d) a few hours of waiting
28. 28.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) smell it closely (d) poke it with a finger
29. 29.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) the water increases (b) some water evaporates (c) it turns to salt (d) it turns to ice
31. 31.True or false: a balloon is not needed for the balloon rocket. (a) False (b) True
32. 32.💧 Which of these does not let water climb? (a) a cotton thread (b) a piece of chalk (c) a sugar cube (d) a piece of foil
33. 33.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
34. 34.☀️ What is white sunlight really made of? (a) tiny drops of water (b) only yellow light (c) tiny bits of dust (d) many colours mixed
35. 35.True or false: sugar left unstirred dissolves slower. (a) True (b) False
36. 36.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a sunny window (c) bright sunlight (d) a balloon
37. 37.True or false: honey is not needed for the density tower. (a) False (b) True
38. 38.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes forward (b) goes backward
39. 39.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) green (c) red (d) violet
40. 40.💧 Which change is this: sweat drying on skin? (a) condensation (b) freezing (c) evaporation (d) melting

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