Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 794 · 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 — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 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.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
4. 4.🎈 Why does the balloon blow up? (a) vinegar is hot (b) outside air gets in (c) gas is made inside (d) the bottle shrinks
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
6. 6.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
7. 7.🪴 Which of these is a job of the leaves? (a) hold the plant in soil (b) take in water from soil (c) carry water upward (d) give out water vapour
8. 8.🌱 Which of these does not sprout? (a) seeds in the freezer (b) wet seeds by a window (c) wet seeds in the dark (d) seeds on wet cotton
9. 9.🧺 Do we need a battery cell for the leafy bag test? (a) not needed (b) needed
10. 10.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) skip washing
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) it turns to butter (d) salt crystals form
12. 12.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a pressure cooker (b) a rolling pin (c) a mathani (churner) (d) a sieve
13. 13.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
14. 14.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves stay behind (b) both stay behind (c) tea stays behind (d) leaves pass through
15. 15.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) baking soda water (d) curd
16. 16.True or false: baking soda dissolves in water. (a) False (b) True
17. 17.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) an empty bottle (c) sugar (d) baking soda
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is what we measure. (a) True (b) False
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) spoons of baking soda (c) size of the balloon (d) the kind of balloon
20. 20.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) turmeric powder (c) lemon juice (d) a mirror
21. 21.True or false: a magnet is not needed for the muddy water filter. (a) False (b) True
22. 22.True or false: a small bowl is needed for the secret lemon message. (a) False (b) True
23. 23.True or false: freezing water is a change that cannot be undone. (a) True (b) False
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.True or false: tea leaves from tea is done by winnowing. (a) False (b) True
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) no, it stays brown (c) yes, if cooled (d) yes, if shaken
28. 28.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) neither of them (c) the hot sunny day (d) the cool cloudy day
29. 29.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a rubber band (c) a potted plant (d) yeast
30. 30.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) cotton or cloth (c) a balloon (d) a mirror
31. 31.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
32. 32.🌱 Which of these is needed for a seed to sprout? (a) soil (b) salt (c) sugar (d) water
33. 33.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so cream does not spill (c) so it gets hot (d) so air gets out
34. 34.🧺 Do we need a small bowl for sprouting seeds? (a) not needed (b) needed
35. 35.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) browning lemon ink (d) melting ice
36. 36.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) sunlight (c) a few hours (d) a magnet
37. 37.🧺 Which of these is not needed for making butter? (a) a balloon (b) a bowl (c) a jar with a tight lid (d) cold water to rinse
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same funnel (b) the amount poured (c) the filter material (d) the same muddy water
39. 39.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) soap solution (d) lemon juice
40. 40.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a comb (c) vinegar (d) a funnel or spoon

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