Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 280 · 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.⚖️ 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 glass (b) how much of each liquid (c) the same three liquids (d) the order of the layers
2. 2.🚁 Which of these falls slowly through the air? (a) a glass marble (b) a coin (c) a stone (d) a paper helicopter
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
4. 4.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they never dry (b) slower (c) they turn to ice (d) faster
5. 5.🍯 Is a cork denser or less dense than water? (a) denser than water (b) less dense than water
6. 6.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the water turns green (c) the stem turns to ice (d) the petals turn bluish
8. 8.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is kept the same. (a) False (b) True
9. 9.🚀 Which of these goes forward? (a) air from the balloon (b) water from the oars (c) gas from the rocket (d) the balloon
10. 10.🧺 Do we need sticky tape for the balloon rocket? (a) not needed (b) needed
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.True or false: a ping-pong ball is less dense than water. (a) True (b) False
13. 13.🍯 Is very salty water denser or less dense than water? (a) less dense than water (b) denser than water
14. 14.True or false: yeast is not needed for the float-or-sink test. (a) False (b) True
15. 15.True or false: a piece of thermocol floats on water. (a) True (b) False
16. 16.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to drops (b) it disappears (c) it turns to smoke (d) it turns to salt
17. 17.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) water is heavier (d) the card gets wet
18. 18.True or false: a balloon is not needed for the paper helicopter. (a) True (b) False
19. 19.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) in the oil layer (c) in the water layer (d) at the very bottom
20. 20.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) run around the tub (c) leave water on the floor (d) play near a deep pond
21. 21.🔍 Which is the odd one out? (a) a piece of thermocol (b) a dry leaf (c) an ice-cream stick (d) a steel spoon
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) yeast (c) a sink or a bucket (d) a glass of water
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the water temperature (c) the amount of sugar
25. 25.🛟 How should you check if the sugar has dissolved? (a) taste it (b) poke it with a finger (c) look for leftover grains (d) smell it closely
26. 26.🧺 Which of these is needed for the density tower? (a) a mirror (b) honey (c) yeast (d) a battery cell
27. 27.🛟 What should you do with popped balloon pieces? (a) give them to a baby (b) chew them (c) keep them in your mouth (d) throw them away safely
28. 28.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a balloon rocket (b) a mirror (c) a sundial (d) a fridge magnet
29. 29.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes backward (b) goes forward
30. 30.⚖️ 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 same glass (b) how much of each liquid (c) the order of pouring (d) the same three liquids
31. 31.🛟 Does a feather float or sink in water? (a) floats (b) sinks
32. 32.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes forward (b) goes backward
33. 33.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the size of the bowl (b) how many drops form (c) the cling film cover (d) sun or shade
34. 34.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a long string (c) vinegar (d) a drinking straw
35. 35.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) sugar in icy water (d) powdered sugar
36. 36.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
37. 37.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) two chairs (d) a long string
38. 38.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) powdered sugar (c) the sugar cube (d) neither of them
39. 39.🔍 Which is the odd one out? (a) an ice cube (b) air (c) a glass marble (d) cooking oil
40. 40.True or false: the rocket goes forward. (a) True (b) False

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