Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 316 · 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.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it sinks faster (b) it dissolves (c) it can float (d) it turns to stone
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) turmeric powder (c) a towel (d) a balloon
3. 3.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a magnet (b) sticky tape (c) a balloon (d) two chairs
4. 4.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) steel is very light (c) its hollow shape (d) sea water is warm
5. 5.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a balloon rocket (b) a mirror (c) a fridge magnet (d) a sundial
6. 6.True or false: a compass needle works by magnetism. (a) True (b) False
7. 7.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the length of the blades (b) time to reach the floor (c) the kind of paper (d) the paper clip
8. 8.True or false: a ping-pong ball is denser than water. (a) True (b) False
9. 9.🍯 Why does honey sink to the bottom of the glass? (a) it is the coldest (b) it is the densest (c) it is yellow (d) it is the stickiest
10. 10.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) sharp kitchen shears (c) a paper cutter (d) safety scissors
11. 11.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) do not lick the spoon (c) throw the glass (d) taste each layer
12. 12.🥄 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🛟 Which of these floats on water? (a) a ball of clay (b) a metal key (c) an ice cube (d) a glass marble
14. 14.True or false: a balloon is not needed for the balloon rocket. (a) False (b) True
15. 15.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) small pebbles (d) cooking oil
17. 17.⚖️ 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) distance it travels (c) the slope of the string (d) the same string
18. 18.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls slowly (b) falls fast
19. 19.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it turns into a kite (c) it goes less far (d) it flies off the string
20. 20.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the stirring (b) time to dissolve (c) the amount of sugar (d) the water temperature
21. 21.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
22. 22.⚖️ 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 same window (b) the amount of water (c) brightness of rainbow
23. 23.🛟 Who should trim the flower stem? (a) a toddler (b) anyone, without looking (c) a grown-up (d) a pet
24. 24.🎈 Why does the balloon rocket move along the string? (a) the straw is heavy (b) escaping air pushes it (c) a magnet pulls it (d) the string pulls it
25. 25.🔍 Which is the odd one out? (a) a stone (b) a glass marble (c) a coin (d) a paper helicopter
26. 26.📘 What does “dense” mean? (a) very colourful (b) very hot (c) heavy for its size (d) very thin
27. 27.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it gets too heavy (c) it turns into a kite (d) it can pop loudly
28. 28.True or false: the rowing boat goes backward. (a) False (b) True
29. 29.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the drop height (b) time to reach the floor (c) the kind of paper (d) the person dropping
30. 30.True or false: turmeric powder is not needed for the density tower. (a) True (b) False
31. 31.🧺 Do we need a mirror for the water cycle bowl? (a) needed (b) not needed
32. 32.🍯 Which of these is less dense than water? (a) a glass marble (b) very salty water (c) a ping-pong ball (d) a pebble
33. 33.True or false: an ice cube sinks in water. (a) False (b) True
34. 34.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed
35. 35.🛟 Does a dry leaf float or sink in water? (a) floats (b) sinks
36. 36.🔍 Which is the odd one out? (a) sugar (b) food colour (c) glucose powder (d) chalk powder
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) yeast (c) a sink or a bucket (d) a stiff postcard
38. 38.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
39. 39.📘 What is water vapour? (a) tiny ice cubes (b) water as a gas (c) salty water (d) a kind of smoke
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same

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