Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 781 · 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.⚖️ 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 kept the same. (a) True (b) False
2. 2.True or false: a coin is denser than water. (a) False (b) True
3. 3.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a battery cell (d) a clear glass of water
4. 4.🌈 How many colours do we name in a rainbow (VIBGYOR)?
5. 5.🔍 Which is the odd one out? (a) dew on morning grass (b) drops under a pot lid (c) drops on a cold glass (d) snow turning to water
6. 6.🧺 Which of these is not needed for the water cycle bowl? (a) ice cubes (b) water (c) a mirror (d) sunlight
7. 7.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the length of the blades (b) time to reach the floor (c) the person dropping (d) the paper clip
8. 8.🛟 Why should only a grown-up handle any hot water? (a) hot water is magnetic (b) hot water is heavy (c) hot water can scald (d) it changes colour
9. 9.🍯 Why does honey sink to the bottom of the glass? (a) it is yellow (b) it is the coldest (c) it is the stickiest (d) it is the densest
10. 10.True or false: wet clothes drying is melting. (a) False (b) True
11. 11.🧺 Which of these is not needed for the balloon rocket? (a) a balloon (b) a long string (c) a drinking straw (d) turmeric powder
12. 12.🧺 Do we need ice cubes for the water cycle bowl? (a) not needed (b) needed
13. 13.True or false: a crumpled paper ball falls slowly through the air. (a) True (b) False
14. 14.🔮 Predict: you fold the two blades the other way. What changes? (a) it turns blue (b) it falls upward (c) it does not fall (d) it spins the other way
15. 15.⚖️ 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) how full the glass is (b) the way we turn it (c) whether the card stays (d) the same glass
16. 16.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🧺 Which of these is needed for the density tower? (a) a magnet (b) a spoon (c) a mirror (d) yeast
18. 18.🔍 Which is the odd one out? (a) an ice-cream stick (b) an ice cube (c) a pebble (d) a piece of thermocol
19. 19.🧺 Which of these is needed for the water cycle bowl? (a) a small cup (b) turmeric powder (c) a battery cell (d) a mirror
20. 20.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a bicycle pump (d) a magnetic chess set
21. 21.🛟 What should you do after handling food colour? (a) rub your eyes (b) wipe them on walls (c) wash your hands (d) lick your fingers
22. 22.⚖️ 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) how many drops form (b) the time we wait (c) sun or shade (d) the amount of water
23. 23.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a suction hook (d) a compass needle
24. 24.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a mirror (b) a fridge magnet (c) a sundial (d) a balloon rocket
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) how big we blow it (b) the same string (c) the same straw (d) distance it travels
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the kind of clay (b) the shape of the clay (c) whether it floats (d) the tub of water
28. 28.True or false: yeast is not needed for the water rainbow. (a) True (b) False
29. 29.True or false: a towel for spills is needed for the float-or-sink test. (a) False (b) True
30. 30.True or false: a feather floats on water. (a) False (b) True
31. 31.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the water turns green (c) the petals turn bluish (d) the flower floats away
32. 32.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) False (b) True
33. 33.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
34. 34.True or false: a compass needle works by air pressure. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) dew on morning grass (b) drops on a cold glass (c) a misty bathroom mirror (d) a puddle drying up
36. 36.🧺 Which of these is needed for the balloon rocket? (a) a battery cell (b) a magnet (c) a balloon (d) vinegar
37. 37.⚖️ 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 same three liquids”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🔍 Which is the odd one out? (a) a glass marble (b) honey (c) a cork (d) very salty water
40. 40.True or false: a paper helicopter falls slowly through the air. (a) False (b) True

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