Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 85 · 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.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) the same bowls (c) how many seeds sprout
3. 3.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) lemon juice (c) a magnet (d) yeast
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
5. 5.🔍 Which is the odd one out? (a) writing the message (b) ironing the paper (c) reading the message (d) letting the paper dry
6. 6.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
7. 7.🧺 Do we need a magnet for making butter? (a) needed (b) not needed
8. 8.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) a battery cell (c) baking soda (d) an empty bottle
9. 9.True or false: melting ice is a change that cannot be undone. (a) False (b) True
10. 10.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
11. 11.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
12. 12.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) take in water from soil (c) make seeds (d) carry water upward
13. 13.True or false: yeast is not needed for sprouting seeds. (a) False (b) True
14. 14.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a paper clip (c) a balloon (d) a small bottle
16. 16.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
17. 17.🧺 Which of these is needed for making butter? (a) a balloon (b) yeast (c) turmeric powder (d) cold water to rinse
18. 18.True or false: gravel from fine sand is done by evaporating. (a) True (b) False
19. 19.🫗 How do we separate bran from wheat flour? (a) handpicking (b) filtering (c) winnowing (d) sieving
20. 20.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
21. 21.True or false: a potted plant is not needed for the leafy bag test. (a) True (b) False
22. 22.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) powder (c) clear water (d) thick whipped cream
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
24. 24.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) writing turns green (c) writing stays faint (d) it gets darker
25. 25.🫧 Which of these is neutral? (a) plain water (b) tamarind water (c) curd (d) baking soda water
26. 26.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) vinegar (c) sugar water (d) baking soda water
27. 27.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) fresh cream (c) a balloon (d) a timer
28. 28.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) rub your eyes (c) skip washing (d) wash your hands
29. 29.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
30. 30.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) it turned into air (c) the ink is magnetic (d) dry juice is see-through
31. 31.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no water (c) they have no salt (d) they have no soil
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.🌱 Is salt needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a timer (c) a bowl (d) a balloon
35. 35.🪴 Which of these is a job of the flower? (a) hold the plant in soil (b) carry water upward (c) make seeds (d) take in water from soil
36. 36.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is kept the same. (a) False (b) True
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
38. 38.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
40. 40.True or false: sunlight is needed for the leafy bag test. (a) False (b) True

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