Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 160 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) salt (d) a shallow dish
2. 2.True or false: detergent water is a base. (a) True (b) False
3. 3.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) yeast (c) an adult with an iron (d) a cotton bud
4. 4.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
5. 5.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.🫧 Which of these is an acid? (a) soap solution (b) plain water (c) curd (d) detergent water
8. 8.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rinse with clean water (d) rub it hard
9. 9.🛟 Why must children keep their fingers away from the iron? (a) it can burn skin (b) it is magnetic (c) it is sticky (d) it is cold
10. 10.True or false: a bowl is not needed for making butter. (a) False (b) True
11. 11.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it can block breathing (c) it gets wet (d) it changes colour
12. 12.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) wash your hands (c) skip washing (d) lick your fingers
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) the same bottle (c) the kind of balloon (d) spoons of baking soda
14. 14.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) the juice scorches first (c) paper turns lemony (d) the iron is brown
15. 15.True or false: make seeds is a job of the flower. (a) True (b) False
16. 16.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) clear water only (c) lumps of butter (d) bubbles of gas
17. 17.True or false: sunlight is needed for the leafy bag test. (a) True (b) False
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) sun or shade (c) the size of the plant
19. 19.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) salt (d) time
20. 20.🧈 Before the butter appears, what does the cream turn into? (a) clear water (b) ice (c) powder (d) thick whipped cream
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
22. 22.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) soil (c) sunlight (d) warmth
23. 23.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a mirror (c) an adult with an iron (d) a battery cell
24. 24.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it grows bigger (c) there is no change (d) it turns blue
25. 25.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) how many seeds sprout (b) the same place (c) the same bowls (d) wet or dry cotton
26. 26.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a funnel or spoon (c) an empty bottle (d) a battery cell
28. 28.🫧 Which of these is an acid? (a) vinegar (b) sugar water (c) detergent water (d) baking soda water
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.True or false: cold water to rinse is not needed for making butter. (a) True (b) False
32. 32.🫧 Which of these is neutral? (a) detergent water (b) lemon juice (c) salt water (d) tamarind water
33. 33.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
34. 34.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
35. 35.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) baking a cake (d) folding paper
36. 36.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
37. 37.True or false: bad grains from rice is done by handpicking. (a) True (b) False
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
39. 39.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners

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