Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 251 · 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.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) food colour (d) turmeric powder
2. 2.True or false: yeast is needed for the float-or-sink test. (a) True (b) False
3. 3.🧺 Do we need sugar for the dissolving test? (a) not needed (b) needed
4. 4.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of pouring (b) the same glass (c) the order of the layers
5. 5.🍯 Which of these is denser than water? (a) air (b) honey (c) an ice cube (d) a cork
6. 6.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) chalk powder (d) glucose powder
7. 7.True or false: a flower stem lets water climb up it. (a) False (b) True
8. 8.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) cling film (c) a small cup (d) a battery cell
9. 9.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) near a plug point (d) on a bed
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) whether it floats (c) the amount of clay
11. 11.🔍 Which is the odd one out? (a) a glass marble (b) a piece of chalk (c) a paper towel (d) a sugar cube
12. 12.True or false: cling film is needed for the water cycle bowl. (a) False (b) True
13. 13.💧 Which change is this: drops on a cold glass? (a) freezing (b) evaporation (c) condensation (d) melting
14. 14.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) turmeric powder (c) a spoon (d) water with food colour
15. 15.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the glass breaks (d) the water turns to ice
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) the cap is sticky (d) water is hiding there
17. 17.💧 In the covered bowl, where does the water vapour come from? (a) the bowl itself (b) the air outside (c) the cling film (d) water warmed by the Sun
18. 18.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a mirror (b) sunlight (c) a big bowl (d) a small cup
19. 19.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is kept the same. (a) True (b) False
20. 20.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it dissolves (c) it sinks faster (d) it can float
22. 22.🔍 Which is the odd one out? (a) a ball of clay (b) an iron nail (c) a steel spoon (d) an ice-cream stick
23. 23.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) magnetism (c) capillary action (d) evaporation
24. 24.🌊 What pushes a floating cork upward? (a) the cork itself (b) the air above (c) the tub (d) the water
25. 25.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.True or false: a mirror is needed for the coloured flower experiment. (a) True (b) False
27. 27.🚁 Which of these falls slowly through the air? (a) a crumpled paper ball (b) a glass marble (c) a fluff of cotton (d) a steel spoon
28. 28.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) True (b) False
29. 29.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) hot water is magnetic (c) it changes colour (d) hot water is heavy
30. 30.🥄 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) sawdust (d) table salt
31. 31.True or false: a coin floats on water. (a) True (b) False
32. 32.🛟 Which of these floats on water? (a) an iron nail (b) a pebble (c) a coin (d) a feather
33. 33.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) sugar stirred well (c) sugar in icy water (d) a big sugar cube
34. 34.True or false: a feather sinks in water. (a) True (b) False
35. 35.True or false: a cork floats on water. (a) True (b) False
36. 36.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes forward (b) goes backward
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is kept the same. (a) False (b) True
38. 38.⚖️ 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 order of the layers (b) the same glass (c) the same three liquids (d) the order of pouring
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same glass (b) the same card (c) how full the glass is (d) whether the card stays
40. 40.🔮 Predict: the string slopes uphill. What happens? (a) it speeds up (b) it goes backward first (c) it travels farther (d) it travels less far

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