Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 484 · 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 cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) time to make butter (c) the same jar (d) the cream temperature
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) detergent water (d) tamarind water
3. 3.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) turmeric powder (d) warm water
5. 5.🧺 Do we need a mirror for the fizzy balloon? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) turmeric powder (d) an adult with an iron
7. 7.🌱 Will these sprout: seeds on dry cotton? (a) does not sprout (b) sprouts
8. 8.True or false: muddy water is needed for the muddy water filter. (a) False (b) True
9. 9.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) True (b) False
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) a mirror (d) turmeric powder
13. 13.True or false: sunlight is not needed for a seed to sprout. (a) False (b) True
14. 14.True or false: ironing the paper is a job a child can do. (a) False (b) True
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
16. 16.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
17. 17.True or false: folding paper is a change that can be undone. (a) False (b) True
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a balloon (d) water
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
22. 22.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) cooking an egg (d) baking a cake
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
24. 24.🍋 Which of these steps is a job for an adult? (a) reading the message (b) putting the iron away (c) dipping the cotton bud (d) letting the paper dry
25. 25.True or false: letting the paper dry is a job a child can do. (a) False (b) True
26. 26.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
27. 27.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) shake it near your face (c) put it in your mouth (d) keep it away from eyes
28. 28.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.True or false: carry water upward is a job of the flower. (a) True (b) False
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
33. 33.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) butter lumps (c) still runny cream (d) ghee
34. 34.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) warm water (c) a mirror (d) a magnet
36. 36.True or false: curd is an acid. (a) True (b) False
37. 37.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a comb (c) a balloon (d) sugar
38. 38.True or false: a bowl is not needed for making butter. (a) False (b) True
39. 39.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) cutting the lemon (c) ironing the paper (d) reading the message
40. 40.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) soap solution (d) detergent water

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