Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 163 · 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.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) it changes colour (c) hot water is heavy (d) hot water is magnetic
2. 2.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes forward (b) goes backward
3. 3.🔍 Which is the odd one out? (a) air (b) honey (c) cooking oil (d) a cork
4. 4.True or false: a sunny window is needed for the water rainbow. (a) True (b) False
5. 5.🧺 Do we need turmeric powder for the paper helicopter? (a) not needed (b) needed
6. 6.🛟 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 it turns blue (d) so the Sun moves
7. 7.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a towel for spills (c) a results table (d) a mirror
8. 8.💧 In the covered bowl, where does the water vapour come from? (a) the bowl itself (b) water warmed by the Sun (c) the air outside (d) the cling film
9. 9.🌈 How many colours do we name in a rainbow (VIBGYOR)?
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a towel (c) a magnet (d) a stiff postcard
11. 11.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) the water turns red (c) fewer drops form (d) more drops form
12. 12.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the water temperature (b) the kind of sugar (c) the stirring (d) time to dissolve
13. 13.True or false: powdered sugar dissolves faster. (a) False (b) True
14. 14.📘 What does “dense” mean? (a) very colourful (b) very hot (c) very thin (d) heavy for its size
15. 15.📘 What do we call water with sugar dissolved in it? (a) a crystal (b) a solution (c) a magnet (d) a rainbow
16. 16.🚀 Which of these goes backward? (a) the balloon (b) the rocket (c) the swimmer (d) water from the oars
17. 17.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it spread in the water (b) it became air (c) it sank as sand (d) it vanished for ever
18. 18.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a high window ledge (c) a wobbly chair (d) a roof edge
19. 19.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it dissolves (c) it sinks (d) it still floats
20. 20.True or false: a crumpled paper ball falls fast through the air. (a) True (b) False
21. 21.⚖️ 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 three liquids is kept the same. (a) True (b) False
22. 22.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.💧 Which of these does not let water climb? (a) a strip of cloth (b) a paper towel (c) a piece of chalk (d) a glass marble
24. 24.🛟 Does a piece of thermocol float or sink in water? (a) floats (b) sinks
25. 25.🧺 Do we need a teaspoon for the dissolving test? (a) not needed (b) needed
26. 26.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) True (b) False
28. 28.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a glass of water (d) a battery cell
30. 30.🧺 Which of these is not needed for the density tower? (a) turmeric powder (b) a spoon (c) a tall clear glass (d) water with food colour
31. 31.🧺 Do we need honey for the density tower? (a) needed (b) not needed
32. 32.⚖️ 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 order of the layers (c) the same three liquids
33. 33.True or false: the swimmer goes forward. (a) True (b) False
34. 34.🧺 Which of these is needed for the balloon rocket? (a) a battery cell (b) yeast (c) vinegar (d) a balloon
35. 35.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a balloon (c) a sunny window (d) turmeric powder
36. 36.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a paper towel (b) a flower stem (c) a piece of chalk (d) a plastic ruler
38. 38.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a white flower (d) a few hours of waiting
39. 39.🔍 Which layer is on top in the honey-water-oil tower? (a) coloured water (b) cooking oil (c) honey (d) the spoon
40. 40.🔍 Which is the odd one out? (a) an ice-cream stick (b) a piece of thermocol (c) a ball of clay (d) a cork

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