Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 207 · 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.True or false: tamarind water is an acid. (a) True (b) False
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) keep it away from eyes (c) shake it near your face (d) seal it in a glass jar
3. 3.🪴 Which part of a plant does this job: take in water from soil? (a) roots (b) leaves (c) flower (d) stem
4. 4.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
5. 5.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
6. 6.🔮 Predict: you stop shaking after only one minute. What do you have? (a) still runny cream (b) butter lumps (c) ghee (d) cheese
7. 7.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) True (b) False
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
9. 9.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) salt (d) warm water
10. 10.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
11. 11.True or false: a comb is not needed for the turmeric test. (a) True (b) False
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon
13. 13.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) blue (c) green (d) brown
14. 14.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
15. 15.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it makes salt (b) it is much faster (c) it takes much longer (d) it turns pink
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) dry yeast (d) a battery cell
17. 17.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) reading the message (c) plugging in the iron (d) putting the iron away
18. 18.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) a rubber band (c) vinegar (d) sunlight
19. 19.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
20. 20.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) food colour (d) small pebbles
21. 21.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is magnetic (c) it can burn skin (d) it is cold
22. 22.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it changes colour (d) it can block breathing
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) an adult with an iron (c) a magnet (d) white paper
26. 26.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
27. 27.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) False (b) True
29. 29.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) cotton or cloth (c) a clean glass (d) a funnel
32. 32.True or false: make food in sunlight is a job of the roots. (a) False (b) True
33. 33.True or false: chaff from wheat grain is done by winnowing. (a) True (b) False
34. 34.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
35. 35.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) pale yellow (c) bright red (d) dark green
36. 36.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) time to make butter (c) how hard we shake (d) the cream temperature
37. 37.🪴 Which of these is a job of the flower? (a) make food in sunlight (b) hold up the leaves (c) make seeds (d) carry water upward
38. 38.🫗 How do we separate bran from wheat flour? (a) evaporating (b) sieving (c) filtering (d) handpicking
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the same bottle

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