Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 152 · 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 is needed for making butter? (a) a magnet (b) fresh cream (c) a balloon (d) a mirror
2. 2.🔍 Which is the odd one out? (a) browning lemon ink (b) dissolving salt (c) cooking an egg (d) baking a cake
3. 3.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a comb (d) sugar
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
7. 7.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
8. 8.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) small pebbles (d) cooking oil
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is what we measure. (a) True (b) False
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a balloon (d) a battery cell
13. 13.🫧 Which of these is an acid? (a) sugar water (b) detergent water (c) curd (d) plain water
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) a shallow dish (d) a spoon
15. 15.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it gets wet (d) it can block breathing
16. 16.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
17. 17.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the kind of juice (c) the same cotton bud (d) how dark the writing is
19. 19.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
20. 20.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
22. 22.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) physical (c) chemical (d) magnetic
23. 23.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
24. 24.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) blue (d) green
25. 25.🫗 How do we separate chaff from wheat grain? (a) winnowing (b) sieving (c) filtering (d) evaporating
26. 26.True or false: sugar is something yeast needs. (a) False (b) True
27. 27.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
28. 28.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.True or false: a comb is not needed for the fizzy balloon. (a) False (b) True
30. 30.🧺 Which of these is not needed for the fizzy balloon? (a) a seed (b) a balloon (c) a funnel or spoon (d) an empty bottle
31. 31.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) orange juice (d) plain water
32. 32.True or false: take in water from soil is a job of the roots. (a) True (b) False
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a dropper or spoon (d) a mirror
34. 34.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a comb (c) white paper strips (d) water
36. 36.True or false: hold up the leaves is a job of the leaves. (a) False (b) True
37. 37.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) ignore it (c) rub it hard (d) add baking soda
38. 38.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sand (d) baking soda
39. 39.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.True or false: tea leaves from tea is done by winnowing. (a) True (b) False

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