Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 387 · 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.True or false: the balloon goes backward. (a) True (b) False
2. 2.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
3. 3.🌈 How many colours do we name in a rainbow (VIBGYOR)?
4. 4.True or false: sugar left unstirred dissolves slower. (a) False (b) True
5. 5.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) the same glass (c) brightness of rainbow
6. 6.🧺 Which of these is needed for the water rainbow? (a) yeast (b) bright sunlight (c) a battery cell (d) a balloon
7. 7.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) never look at the Sun (d) look at it in a mirror
8. 8.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
9. 9.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) a magnet (c) two chairs (d) a balloon
10. 10.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the water turns red (b) more drops form (c) fewer drops form (d) the bowl freezes
11. 11.🔍 Which is the odd one out? (a) cooking oil (b) a coin (c) a ping-pong ball (d) air
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a balloon
13. 13.🔍 Which is the odd one out? (a) a steel spoon (b) an ice cube (c) a piece of thermocol (d) a dry leaf
14. 14.🧺 Do we need sugar for the dissolving test? (a) needed (b) not needed
15. 15.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the small pebble (b) the big log (c) both of them (d) neither of them
17. 17.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it can pop loudly (c) it gets too heavy (d) it turns into a kite
18. 18.🧺 Do we need a mirror for the float-or-sink test? (a) needed (b) not needed
19. 19.🛟 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
20. 20.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) sand (d) cooking oil
21. 21.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) pour more water (c) leave them wet (d) wipe them dry
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is kept the same. (a) False (b) True
23. 23.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
24. 24.True or false: yeast is not needed for the density tower. (a) False (b) True
25. 25.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar stirred well (c) sugar in warm water (d) a big sugar cube
26. 26.True or false: sugar is not needed for the dissolving test. (a) False (b) True
27. 27.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) slower (b) they never dry (c) they turn to ice (d) faster
28. 28.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it goes less far (c) it goes much farther (d) it flies off the string
29. 29.🧺 Do we need a magnet for the dissolving test? (a) not needed (b) needed
30. 30.💧 Which of these does not let water climb? (a) a paper towel (b) a cotton thread (c) a strip of cloth (d) a steel spoon
31. 31.🧺 Do we need a battery cell for the float-or-sink test? (a) not needed (b) needed
32. 32.🔮 Predict: the string slopes uphill. What happens? (a) it speeds up (b) it travels farther (c) it goes backward first (d) it travels less far
33. 33.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a glass of water (c) turmeric powder (d) a few hours of waiting
34. 34.⚖️ 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 measure it (c) we keep it the same
35. 35.🛟 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
36. 36.💧 Which of these is melting? (a) water becoming ice (b) drops under a pot lid (c) butter going runny (d) making ice lollies
37. 37.🧺 Which of these is needed for the water cycle bowl? (a) water (b) yeast (c) a magnet (d) a battery cell
38. 38.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) vinegar (c) two chairs (d) a balloon
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a mirror (d) a battery cell
40. 40.True or false: a balloon is not needed for the water cycle bowl. (a) True (b) False

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids