Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 311 · 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.🛟 Does a ball of clay float or sink in water? (a) floats (b) sinks
2. 2.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) a mirror (c) a balloon (d) a white flower
3. 3.True or false: a battery cell is needed for the float-or-sink test. (a) True (b) False
4. 4.True or false: a plastic ruler lets water climb up it. (a) True (b) False
5. 5.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a magnet (c) snow falling (d) a small rainbow
6. 6.🛟 Which of these sinks in water? (a) a cork (b) a feather (c) a ball of clay (d) a dry leaf
7. 7.🥄 Which of these dissolves faster? (a) sugar in icy water (b) a big sugar cube (c) sugar left unstirred (d) powdered sugar
8. 8.🥚 A fresh egg sinks in plain water. What makes it float? (a) more plain water (b) lots of salt stirred in (c) a little shaking (d) a few ice cubes
9. 9.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
10. 10.🛟 Why should we wipe up spilled oil at once? (a) oil attracts magnets (b) oil makes it rain (c) spilled oil is slippery (d) oil turns into honey
11. 11.🔍 What do you see after pouring honey, water and oil into one glass? (a) one mixed colour (b) three separate layers (c) the glass gets hot (d) bubbles of gas
12. 12.🧺 Which of these is needed for the coloured flower experiment? (a) a few hours of waiting (b) a magnet (c) a balloon (d) turmeric powder
13. 13.True or false: a big bowl is needed for the water cycle bowl. (a) True (b) False
14. 14.🚁 Dropped from a raised hand, does an open sheet of paper fall slowly or fast? (a) falls slowly (b) falls fast
15. 15.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) the rainbow fades (c) it floats away (d) it turns brighter
16. 16.🥄 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.True or false: cling film is not needed for the water cycle bowl. (a) True (b) False
18. 18.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the same three liquids (b) how much of each liquid (c) the order of the layers (d) the same glass
19. 19.🧺 Do we need a clock or timer for the dissolving test? (a) needed (b) not needed
20. 20.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is hot (d) oil is sticky
21. 21.True or false: two chairs is not needed for the balloon rocket. (a) True (b) False
22. 22.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the tub of water (b) the amount of clay (c) the kind of clay (d) the shape of the clay
23. 23.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) do not lick the spoon (c) throw the glass (d) pour it on the floor
24. 24.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it turns to plastic (c) it sinks at once (d) colour climbs up it
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a glass of water (d) a sink or a bucket
26. 26.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) the paper clip (c) time to reach the floor
28. 28.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) the same straw (c) how big we blow it (d) the same tape
29. 29.True or false: sunlight is not needed for the water cycle bowl. (a) False (b) True
30. 30.🔮 A big log and a small pebble go into a pond. Which one floats? (a) both of them (b) neither of them (c) the small pebble (d) the big log
31. 31.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a glass of water (d) turmeric powder
32. 32.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
33. 33.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the crumpled ball (b) a sheet of glass (c) neither of them (d) the flat sheet
34. 34.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) small pebbles (d) sawdust
35. 35.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the kind of flower
36. 36.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
37. 37.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) smell it closely (d) poke it with a finger
38. 38.⚖️ 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 way we turn it (b) the same glass (c) whether the card stays (d) how full the glass is
39. 39.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.🧺 Which of these is needed for the water cycle bowl? (a) a mirror (b) cling film (c) a magnet (d) a balloon

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