Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 110 · 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.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a magnet (c) a small rainbow (d) a shadow of ice
2. 2.True or false: a coin sinks in water. (a) True (b) False
3. 3.🥄 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🍯 Is air denser or less dense than water? (a) less dense than water (b) denser than water
5. 5.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) slide on them (c) pour more water (d) leave them wet
6. 6.True or false: a battery cell is needed for the paper helicopter. (a) True (b) False
7. 7.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it gets too heavy (c) it turns into a kite (d) it changes colour
8. 8.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes backward (b) goes forward
9. 9.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the person dropping (b) time to reach the floor (c) the length of the blades (d) the kind of paper
10. 10.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) some water evaporates (b) the water increases (c) it turns to ice (d) it turns to salt
11. 11.🧺 Which of these is needed for the density tower? (a) a mirror (b) turmeric powder (c) a magnet (d) water with food colour
12. 12.🚁 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
13. 13.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) air (d) water
14. 14.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to catch any spills (d) to make it rain
15. 15.🚁 Which of these falls fast through the air? (a) a feather (b) a coin (c) an open sheet of paper (d) a paper helicopter
16. 16.🚁 Which of these falls fast through the air? (a) a crumpled paper ball (b) a toy parachute (c) a paper helicopter (d) an open sheet of paper
17. 17.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.True or false: a strip of cloth does not let water climb. (a) False (b) True
20. 20.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
21. 21.True or false: sugar in icy water dissolves faster. (a) False (b) True
22. 22.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) turmeric powder (c) a battery cell (d) a drinking straw
23. 23.🚀 Which of these goes backward? (a) the rocket (b) the swimmer (c) the rowing boat (d) gas from the rocket
24. 24.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🍯 Is cooking oil denser or less dense than water? (a) denser than water (b) less dense than water
26. 26.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) a pencil (c) a magnet (d) a paper clip
27. 27.True or false: turmeric powder is needed for the density tower. (a) False (b) True
28. 28.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the petals turn bluish (c) the stem turns to ice (d) the flower floats away
29. 29.True or false: a drinking straw works by air pressure. (a) False (b) True
30. 30.⚖️ 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 amount of sugar (c) time to dissolve (d) the kind of sugar
31. 31.⚖️ 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 three liquids (b) the same glass (c) how much of each liquid (d) the order of pouring
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a towel (d) a balloon
33. 33.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) a battery cell (c) water (d) a big bowl
34. 34.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it floats away (c) it turns all red (d) it turns brighter
35. 35.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a high window ledge (c) a roof edge (d) from your raised hand
37. 37.🔍 Which is the odd one out? (a) a cotton thread (b) a paper towel (c) a sugar cube (d) a rubber eraser
38. 38.🌈 In VIBGYOR, what number colour is indigo?
39. 39.True or false: a spoon is needed for the density tower. (a) False (b) True
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a sink or a bucket (c) a stiff postcard (d) a glass of water

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