Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 399 · 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 — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) True (b) False
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
3. 3.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
4. 4.🫗 Is filtered pond water safe to drink? (a) no, germs may stay (b) yes, if it is cold (c) yes, if it is clear (d) yes, always
5. 5.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it changes colour (d) it can block breathing
6. 6.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a clear plastic bag (c) a battery cell (d) turmeric powder
9. 9.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) the youngest child (d) only an adult
10. 10.🪴 Which of these is a job of the roots? (a) hold the plant in soil (b) make food in sunlight (c) make seeds (d) hold up the leaves
11. 11.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) how hard we shake (c) the cream temperature
13. 13.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a battery cell (b) a small bowl (c) a few days (d) cotton wool
14. 14.🔮 Predict: the adult irons for only one second. What happens? (a) writing stays faint (b) writing turns green (c) it gets darker (d) the paper floats
15. 15.⚖️ 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 filter material (c) the amount poured (d) how clear the water is
16. 16.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a mirror (c) turmeric powder (d) white paper
17. 17.🔍 Which is the odd one out? (a) salt water (b) plain water (c) sugar water (d) lemon juice
18. 18.True or false: a mirror is needed for the leafy bag test. (a) True (b) False
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) spoons of baking soda (c) the kind of balloon (d) size of the balloon
20. 20.🔍 Which is the odd one out? (a) water (b) salt (c) warmth (d) air
21. 21.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) plain water (d) soap solution
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) soap solution (d) salt water
23. 23.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) a balloon (d) cold water to rinse
24. 24.🫧 Which of these is an acid? (a) salt water (b) baking soda water (c) soap solution (d) vinegar
25. 25.True or false: water is needed for the turmeric test. (a) False (b) True
26. 26.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it turns yellow (c) so air gets out (d) so it gets hot
27. 27.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
28. 28.True or false: a balloon is needed for the fizzy balloon. (a) True (b) False
29. 29.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) blue (c) dark green (d) pale yellow
30. 30.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
31. 31.True or false: a seed is needed for the fizzy balloon. (a) False (b) True
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
33. 33.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) yeast (c) turmeric powder (d) a few hours
34. 34.True or false: salt water is an acid. (a) False (b) True
35. 35.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
36. 36.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
37. 37.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
38. 38.True or false: orange juice is an acid. (a) True (b) False
39. 39.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) a balloon (c) a battery cell (d) water
40. 40.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) no butter forms (c) more butter forms (d) it turns blue

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