Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 445 · 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.🪴 Which part of a plant does this job: hold the plant in soil? (a) roots (b) leaves (c) stem (d) flower
2. 2.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
3. 3.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) salt (d) sunlight
4. 4.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) soap solution (d) tamarind water
5. 5.True or false: baking a cake is a change that can be undone. (a) False (b) True
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) how dark the writing is (b) the same cotton bud (c) the iron setting (d) the ironing time
8. 8.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) heat adds colour (c) the juice scorches first (d) paper turns lemony
10. 10.🔍 Which is the odd one out? (a) letting the paper dry (b) reading the message (c) ironing the paper (d) writing the message
11. 11.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a clear plastic bag (c) vinegar (d) a rubber band
12. 12.True or false: baking soda is needed for the fizzy balloon. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) baking soda water (d) detergent water
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) amount of water drops (c) sun or shade (d) the same kind of bag
15. 15.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wash hands afterwards (c) lick your fingers (d) wipe hands on face
16. 16.True or false: cold water to rinse is needed for making butter. (a) True (b) False
17. 17.True or false: a mirror is not needed for making butter. (a) False (b) True
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a magnet (c) an empty bottle (d) a balloon
20. 20.True or false: plain water is an acid. (a) True (b) False
21. 21.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of yeast
23. 23.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they float apart (c) they react (d) they become magnets
24. 24.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it turns pink (c) it makes salt (d) it takes much longer
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) True (b) False
26. 26.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
27. 27.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
28. 28.🔍 Which is the odd one out? (a) sugar (b) sand (c) food colour (d) glucose powder
29. 29.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) cotton wool (c) a battery cell (d) water
31. 31.⚖️ 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 change it (c) we measure it
32. 32.True or false: soap solution is needed for the turmeric test. (a) False (b) True
33. 33.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) turmeric powder (c) a dropper or spoon (d) lemon juice
35. 35.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
36. 36.True or false: a balloon is needed for the fizzy balloon. (a) False (b) True
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the same bottle (c) size of the balloon
38. 38.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress

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