Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 742 · 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.🌈 In VIBGYOR, what number colour is red?
2. 2.🎈 When does the balloon rocket stop? (a) it never stops (b) when it turns blue (c) when it gets cold (d) when the air runs out
3. 3.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) it floats up (c) it stops in the air (d) faster
4. 4.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns brighter (c) it turns all red (d) it floats away
5. 5.🛟 Does a ball of clay float or sink in water? (a) sinks (b) floats
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the water layer (c) in the honey layer (d) on top of the oil
8. 8.⚖️ 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
9. 9.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the slope of the string (b) the same string (c) how big we blow it (d) the same straw
11. 11.🧺 Do we need a battery cell for the float-or-sink test? (a) needed (b) not needed
12. 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is what we measure. (a) False (b) True
13. 13.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a towel for spills (c) small test objects (d) a tub of water
14. 14.🚁 Dropped from a raised hand, does a steel spoon fall slowly or fast? (a) falls fast (b) falls slowly
15. 15.🥄 Which of these dissolves in water? (a) small pebbles (b) sand (c) sawdust (d) sugar
16. 16.True or false: sugar stirred well dissolves slower. (a) True (b) False
17. 17.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it magnetic (b) to make it fall slower (c) to stop the spinning (d) to weigh down the bottom
18. 18.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
19. 19.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a glass of water (d) a sink or a bucket
21. 21.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) a paper cutter (c) safety scissors (d) sharp kitchen shears
22. 22.🚀 Which of these goes backward? (a) the rowing boat (b) air from the balloon (c) the rocket (d) the balloon
23. 23.⚖️ 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 order of pouring”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🔍 Which is the odd one out? (a) water becoming ice (b) making ice lollies (c) drops under a pot lid (d) a pond icing over
25. 25.True or false: yeast is needed for the paper helicopter. (a) False (b) True
26. 26.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.True or false: a balloon is needed for the balloon rocket. (a) False (b) True
28. 28.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar in icy water (c) sugar in warm water (d) sugar left unstirred
29. 29.🛟 Which of these sinks in water? (a) an empty capped bottle (b) a feather (c) a dry leaf (d) a metal key
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🔍 Which is the odd one out? (a) a cork (b) a ping-pong ball (c) a metal key (d) a feather
32. 32.🥄 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.True or false: a big bowl is not needed for the water cycle bowl. (a) False (b) True
34. 34.🚢 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
35. 35.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) sugar (d) glucose powder
36. 36.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) food colour (c) a white flower (d) a battery cell
37. 37.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) honey (c) a magnet (d) a spoon
38. 38.🛟 Does a pebble float or sink in water? (a) floats (b) sinks
39. 39.True or false: a coin is less dense than water. (a) False (b) True
40. 40.True or false: a coin is denser than water. (a) False (b) True

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