Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 334 · 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 a change that can be undone? (a) rusting iron (b) milk turning to curd (c) browning lemon ink (d) melting ice
2. 2.🧺 Which of these is not needed for the leafy bag test? (a) vinegar (b) a potted plant (c) a clear plastic bag (d) a few hours
3. 3.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so air gets out (c) so it gets hot (d) so it turns yellow
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same muddy water (b) how clear the water is (c) the filter material
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🔍 Which is the odd one out? (a) browning lemon ink (b) melting ice (c) cooking an egg (d) milk turning to curd
7. 7.🔍 Which is the odd one out? (a) tamarind water (b) orange juice (c) detergent water (d) vinegar
8. 8.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) time to make butter (c) the amount of cream (d) the cream temperature
10. 10.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a mirror (c) a balloon (d) white paper strips
11. 11.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) True (b) False
13. 13.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) detergent water (c) plain water (d) tamarind water
14. 14.True or false: bran from wheat flour is done by evaporating. (a) True (b) False
15. 15.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) yes, if it is cold (d) no, germs may stay
16. 16.True or false: yeast is not needed for the muddy water filter. (a) True (b) False
17. 17.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
18. 18.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) the amount of vinegar (c) the kind of balloon (d) spoons of baking soda
20. 20.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
21. 21.⚖️ 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 measure it (b) we keep it the same (c) we change it
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is magnetic (d) soap is an acid
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the same muddy water (c) the filter material (d) the same funnel
26. 26.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
27. 27.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the same jar (b) the cream temperature (c) time to make butter
29. 29.True or false: a magnet is not needed for making butter. (a) True (b) False
30. 30.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) lick your fingers (d) wash hands afterwards
31. 31.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
32. 32.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) much less water (c) exactly the same (d) it fills with soil
33. 33.🌱 Which of these is not needed for a seed to sprout? (a) water (b) warmth (c) salt (d) air
34. 34.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) it stays white (d) green
35. 35.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
36. 36.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) chemical (c) musical (d) physical
37. 37.🔮 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
38. 38.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
39. 39.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) almost nothing (c) dark brown words (d) blue words
40. 40.True or false: vinegar is an acid. (a) False (b) True

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