Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 702 · 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 — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
2. 2.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
5. 5.🧺 Do we need a tray for spills for the fizzy balloon? (a) not needed (b) needed
6. 6.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
7. 7.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) sunlight (c) a clear plastic bag (d) a mirror
8. 8.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wash hands afterwards (c) wipe hands on face (d) lick your fingers
9. 9.True or false: a battery cell is needed for the muddy water filter. (a) False (b) True
10. 10.🧺 Which of these is not needed for sprouting seeds? (a) cotton wool (b) water (c) a few days (d) a magnet
11. 11.🫧 Which of these is an acid? (a) sugar water (b) soap solution (c) baking soda water (d) curd
12. 12.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a magnet (c) a bowl (d) fresh cream
13. 13.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) vinegar (c) a magnet (d) a clear plastic bag
14. 14.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
16. 16.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
17. 17.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) yes, they sprout (c) no, never (d) they turn to stones
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) False (b) True
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) True (b) False
21. 21.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) whoever is fastest (d) only an adult
22. 22.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) wet seeds in the dark (d) seeds on dry cotton
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
25. 25.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) water (c) white paper strips (d) soap solution
26. 26.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) physical (c) musical (d) magnetic
27. 27.🔍 Which is the odd one out? (a) dipping the cotton bud (b) cutting the lemon (c) letting the paper dry (d) writing the message
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a magnet (d) yeast
29. 29.🫗 How do we separate husk from rice grain? (a) winnowing (b) handpicking (c) sieving (d) evaporating
30. 30.🫗 Which of these is done by evaporating? (a) gravel from fine sand (b) salt from sea water (c) husk from rice grain (d) chaff from wheat grain
31. 31.🫗 Why does filtered muddy water look clearer? (a) the filter traps mud (b) the filter adds soap (c) the mud dissolves (d) the water evaporates
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) the kind of balloon (c) spoons of baking soda (d) the amount of vinegar
33. 33.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) detergent water (d) soap solution
34. 34.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) keep it away from eyes (c) put it in your mouth (d) shake it near your face
35. 35.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) yeast (c) white paper (d) a cotton bud
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
37. 37.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) sand and pebbles (c) a mirror (d) a funnel
38. 38.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) tamarind water (d) salt water
39. 39.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) white paper strips (d) a balloon
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False

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