Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 739 · 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 the one thing we change? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the liquid we test
2. 2.True or false: give out water vapour is a job of the roots. (a) False (b) True
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the same glass (c) the filter material (d) how clear the water is
4. 4.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
5. 5.True or false: sugar is something yeast does not need. (a) True (b) False
6. 6.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the light we look in
9. 9.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
10. 10.🛟 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
11. 11.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) turmeric powder (d) cold water to rinse
12. 12.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
13. 13.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
14. 14.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
15. 15.🪴 Which part of a plant does this job: make food in sunlight? (a) leaves (b) stem (c) roots (d) flower
16. 16.True or false: a mirror is needed for the fizzy balloon. (a) True (b) False
17. 17.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold water is heavy (d) cold makes it pink
18. 18.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
19. 19.True or false: a funnel is needed for the muddy water filter. (a) False (b) True
20. 20.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) vinegar (c) sugar (d) a mirror
21. 21.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
22. 22.True or false: a battery cell is not needed for the leafy bag test. (a) False (b) True
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) a shallow dish (d) a spoon
24. 24.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) glucose powder (d) sugar
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) sugar (d) a small bottle
26. 26.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) air (c) sunlight (d) water
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the amount of water (d) the amount of sugar
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
30. 30.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
31. 31.True or false: a comb is not needed for the turmeric test. (a) True (b) False
32. 32.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) a balloon (d) turmeric powder
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a balloon (c) fresh cream (d) a bowl
35. 35.🫧 Which of these is neutral? (a) lemon juice (b) detergent water (c) plain water (d) orange juice
36. 36.🍋 Secret message: who does this step — writing the message? (a) a child can do it (b) an adult does it
37. 37.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) add baking soda (c) ignore it (d) rub it hard
38. 38.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) hot (c) salty (d) muddier
39. 39.🔍 Which is the odd one out? (a) plain water (b) salt water (c) soap solution (d) sugar water
40. 40.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a battery cell (d) a cotton bud

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