Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 170 · 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.True or false: a balloon is needed for the fizzy balloon. (a) False (b) True
2. 2.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) it gets darker (c) writing turns green (d) writing stays faint
3. 3.True or false: a clear plastic bag is needed for the leafy bag test. (a) True (b) False
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) False (b) True
5. 5.True or false: a battery cell is not needed for the secret lemon message. (a) False (b) True
6. 6.True or false: a battery cell is needed for the leafy bag test. (a) True (b) False
7. 7.True or false: tea leaves from tea is done by winnowing. (a) False (b) True
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
10. 10.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
11. 11.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
12. 12.True or false: yeast is not needed for the leafy bag test. (a) False (b) True
13. 13.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
14. 14.True or false: baking soda is not needed for the fizzy balloon. (a) True (b) False
15. 15.🪴 Which part of a plant does this job: hold up the leaves? (a) roots (b) leaves (c) stem (d) flower
16. 16.🔍 Which is the odd one out? (a) air (b) soil (c) warmth (d) water
17. 17.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) add baking soda (d) rinse with clean water
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.True or false: soil is not needed for a seed to sprout. (a) False (b) True
20. 20.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a comb (c) a funnel or spoon (d) a seed
21. 21.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) almost nothing (d) dark brown words
22. 22.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a jar with a tight lid (c) a battery cell (d) a balloon
23. 23.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) turmeric powder (c) a magnet (d) moong seeds
24. 24.True or false: water is needed for a seed to sprout. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) orange juice (b) tamarind water (c) soap solution (d) lemon juice
26. 26.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it heavy (d) to make it sweet
27. 27.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same place (b) how many seeds sprout (c) wet or dry cotton
28. 28.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) wash your hands (c) skip washing (d) lick your fingers
29. 29.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) False (b) True
31. 31.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes
32. 32.🧺 Do we need yeast for the muddy water filter? (a) not needed (b) needed
33. 33.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) nothing (c) the mud (d) the salt
34. 34.True or false: salt is not needed for growing salt crystals. (a) False (b) True
35. 35.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) roots (c) stem (d) leaves
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
37. 37.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is kept the same. (a) False (b) True
38. 38.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a magnet (c) a clear plastic bag (d) a potted plant
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed

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