Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 260 · 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 the yeast balloon? (a) a paper clip (b) sugar (c) a mirror (d) a battery cell
2. 2.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a potted plant (c) a clear plastic bag (d) vinegar
3. 3.🧂 Which of these does not dissolve in water? (a) food colour (b) small pebbles (c) table salt (d) baking soda
4. 4.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
5. 5.True or false: a cotton bud is not needed for the secret lemon message. (a) False (b) True
6. 6.🧺 Do we need a balloon for the fizzy balloon? (a) needed (b) not needed
7. 7.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the amount of vinegar (c) size of the balloon (d) the kind of balloon
9. 9.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
10. 10.True or false: salt is something yeast does not need. (a) False (b) True
11. 11.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
12. 12.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) whoever is fastest (c) only an adult (d) any child
13. 13.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
14. 14.⚖️ 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 keep it the same (b) we measure it (c) we change it
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) False (b) True
16. 16.🧈 Before the butter appears, what does the cream turn into? (a) powder (b) ice (c) thick whipped cream (d) clear water
17. 17.True or false: water is needed for the turmeric test. (a) True (b) False
18. 18.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
19. 19.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) chemical (c) physical (d) musical
20. 20.🔍 Which is the odd one out? (a) orange juice (b) vinegar (c) salt water (d) tamarind water
21. 21.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a battery cell (c) muddy water (d) cotton or cloth
22. 22.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) gently, not too tight (c) with a hot glue gun (d) as tight as possible
23. 23.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) a mirror (c) a magnet (d) sand and pebbles
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
25. 25.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
26. 26.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
27. 27.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) yeast (c) a battery cell (d) a dropper or spoon
28. 28.True or false: orange juice is neutral. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) sugar water (d) plain water
30. 30.🧺 Do we need a magnet for sprouting seeds? (a) not needed (b) needed
31. 31.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) still runny cream (c) butter lumps (d) cheese
32. 32.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much more water (c) exactly the same (d) much less water
33. 33.🧺 Which of these is needed for making butter? (a) a battery cell (b) fresh cream (c) a mirror (d) a magnet
34. 34.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a small bowl (c) a balloon (d) cotton wool
35. 35.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) blue (d) white
36. 36.True or false: warmth is needed for a seed to sprout. (a) True (b) False
37. 37.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
39. 39.True or false: give out water vapour is a job of the leaves. (a) True (b) False
40. 40.🫗 How do we separate bad grains from rice? (a) evaporating (b) sieving (c) handpicking (d) filtering

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