Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 381 · 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 of these dissolves in water? (a) small pebbles (b) sawdust (c) glucose powder (d) sand
2. 2.🔍 Which is the odd one out? (a) vinegar (b) sugar water (c) baking soda water (d) tamarind water
3. 3.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) magnetic (c) musical (d) physical
4. 4.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) writing stays faint (c) the paper floats (d) it gets darker
5. 5.True or false: seeds on dry cotton does not sprout. (a) False (b) True
6. 6.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) transpiration (c) digestion (d) germination
7. 7.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) vinegar (d) detergent water
8. 8.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
9. 9.🧺 Do we need cold water to rinse for making butter? (a) not needed (b) needed
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a potted plant (c) turmeric powder (d) a few hours
11. 11.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it sinks to the bottom (c) it floats on top (d) it dissolves
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) soap solution (d) a mirror
13. 13.True or false: plugging in the iron is a job for an adult. (a) True (b) False
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) the amount of salt (d) the same dish
15. 15.🫗 How do we separate tea leaves from tea? (a) sieving (b) filtering (c) evaporating (d) handpicking
16. 16.True or false: a magnet is needed for the secret lemon message. (a) True (b) False
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is what we measure. (a) True (b) False
18. 18.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a balloon (c) a comb (d) sugar
19. 19.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is kept the same. (a) False (b) True
20. 20.True or false: give out water vapour is a job of the stem. (a) True (b) False
21. 21.🧈 Before the butter appears, what does the cream turn into? (a) clear water (b) thick whipped cream (c) ice (d) powder
22. 22.True or false: ironing the paper is a job a child can do. (a) True (b) False
23. 23.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
24. 24.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) shake it near your face (d) keep it away from eyes
25. 25.True or false: water is needed for a seed to sprout. (a) True (b) False
26. 26.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is cold (c) it can burn skin (d) it is magnetic
27. 27.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) a small bowl (c) a cotton bud (d) a balloon
28. 28.🫗 Which of these is done by sieving? (a) mud from water (b) tea leaves from tea (c) bran from wheat flour (d) salt from sea water
29. 29.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) air (c) salt (d) water
30. 30.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) True (b) False
33. 33.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
35. 35.🍋 Which of these steps is a job for an adult? (a) writing the message (b) reading the message (c) putting the iron away (d) dipping the cotton bud
36. 36.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sand (d) food colour
37. 37.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a balloon (c) a mirror (d) an adult with an iron
38. 38.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) a comb (d) water
40. 40.True or false: melting ice is a change that can be undone. (a) False (b) True

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