Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 348 · 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 denser than water? (a) cooking oil (b) an ice cube (c) a ping-pong ball (d) honey
2. 2.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to keep children safe (d) to win a prize
3. 3.🔍 Which is the odd one out? (a) drops on a cold glass (b) wet clothes drying (c) sweat drying on skin (d) a puddle drying up
4. 4.⚖️ 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 the layers is the one thing we change. (a) True (b) False
5. 5.🚁 Dropped from a raised hand, does a stone fall slowly or fast? (a) falls fast (b) falls slowly
6. 6.💧 Which of these is freezing? (a) wet hair drying (b) a pond icing over (c) wet clothes drying (d) sweat drying on skin
7. 7.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is what we measure. (a) True (b) False
8. 8.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) warm water (c) a magnet (d) a teaspoon
9. 9.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
10. 10.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) it has a magnet (c) sea water is warm (d) its hollow shape
11. 11.True or false: a piece of chalk lets water climb up it. (a) False (b) True
12. 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is the one thing we change. (a) True (b) False
13. 13.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it goes much farther (c) it goes less far (d) it flies off the string
14. 14.💧 In the covered bowl, where does the water vapour come from? (a) the air outside (b) the bowl itself (c) water warmed by the Sun (d) the cling film
15. 15.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) whether it floats (b) the shape of the clay (c) the tub of water
16. 16.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) the petals turn red (d) no colour change
18. 18.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a clear glass of water (c) turmeric powder (d) bright sunlight
19. 19.💧 Which of these does not let water climb? (a) a piece of chalk (b) a glass marble (c) a cotton thread (d) a strip of cloth
20. 20.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same glass is kept the same. (a) True (b) False
21. 21.🫗 Why does cooking oil float on top of water? (a) oil is less dense (b) oil is hot (c) oil is sticky (d) oil is heavier
22. 22.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
23. 23.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is kept the same. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) glucose powder (d) cooking oil
25. 25.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the length of the stem (b) the room it stands in (c) the amount of water (d) time for colour to show
26. 26.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is the one thing we change. (a) True (b) False
28. 28.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of water (b) the amount of sugar (c) the water temperature (d) the stirring
29. 29.🧺 Do we need sticky tape for the balloon rocket? (a) needed (b) not needed
30. 30.🛟 Which rule keeps the density tower experiment safe? (a) throw the glass (b) do not lick the spoon (c) taste each layer (d) pour it on the floor
31. 31.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) faster (b) not at all (c) slower (d) the same
32. 32.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
33. 33.True or false: glucose powder dissolves in water. (a) True (b) False
34. 34.⚖️ 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) the paper clip (c) time to reach the floor (d) the person dropping
35. 35.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it still floats (c) it dissolves (d) it sinks
36. 36.🔍 Which is the odd one out? (a) a misty bathroom mirror (b) dew on morning grass (c) wet hair drying (d) drops under a pot lid
37. 37.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) a paper cutter (c) sharp kitchen shears (d) safety scissors
38. 38.True or false: a flower stem lets water climb up it. (a) False (b) True
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
40. 40.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False

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