Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 795 · 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.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) it glows in the dark (c) nothing at all (d) lots of fizzy bubbles
2. 2.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it gets wet (d) it can block breathing
3. 3.🔍 Which is the odd one out? (a) rusting iron (b) milk turning to curd (c) dissolving salt (d) cooking an egg
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
5. 5.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) no, never (c) they turn to stones (d) yes, they sprout
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) yeast (c) a magnet (d) a battery cell
7. 7.🌱 Which of these is needed for a seed to sprout? (a) soil (b) salt (c) sugar (d) air
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the number of drops (d) the colour we see
9. 9.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
10. 10.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) smoke (d) steam
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
12. 12.🧺 Do we need a few days for sprouting seeds? (a) not needed (b) needed
13. 13.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
14. 14.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) food colour (d) sand
15. 15.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a cotton bud (c) a battery cell (d) an adult with an iron
16. 16.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a mirror (c) a battery cell (d) lemon juice
17. 17.🔍 Which is the odd one out? (a) freezing water (b) milk turning to curd (c) folding paper (d) melting butter
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
19. 19.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to colour it (d) to make it sweet
20. 20.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a comb (c) a balloon (d) a magnet
21. 21.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
22. 22.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
23. 23.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.True or false: a mirror is needed for the turmeric test. (a) True (b) False
25. 25.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
26. 26.🧺 Do we need a balloon for the secret lemon message? (a) needed (b) not needed
27. 27.🍋 Secret message: who does this step — letting the paper dry? (a) a child can do it (b) an adult does it
28. 28.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
29. 29.True or false: salt from sea water is done by filtering. (a) True (b) False
30. 30.True or false: vinegar is something yeast does not need. (a) True (b) False
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a battery cell (d) salt
32. 32.True or false: warm water is needed for the yeast balloon. (a) False (b) True
33. 33.⚖️ 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 change it (b) we keep it the same (c) we measure it
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) turmeric powder (d) a spoon
35. 35.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
38. 38.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) soap solution (d) a comb
39. 39.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it can burn skin (c) it is magnetic (d) it is cold
40. 40.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid

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