Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 420 · 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 yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
2. 2.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
3. 3.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they melt (c) yes, they sprout (d) they turn to stones
4. 4.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) melting butter (d) rusting iron
5. 5.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the kind of balloon (b) size of the balloon (c) the same bottle (d) the amount of vinegar
7. 7.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) salt water (d) baking soda water
8. 8.True or false: vinegar is not needed for the leafy bag test. (a) False (b) True
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of water
10. 10.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) table salt (d) sawdust
11. 11.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they react (c) they become magnets (d) they float apart
12. 12.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) turmeric powder (b) a cotton bud (c) lemon juice (d) white paper
13. 13.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
14. 14.True or false: carry water upward is a job of the stem. (a) False (b) True
15. 15.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
16. 16.🪴 Which of these is a job of the leaves? (a) give out water vapour (b) make seeds (c) carry water upward (d) hold up the leaves
17. 17.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) salt (d) sugar
18. 18.⚖️ 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 amount poured (c) the same muddy water (d) the filter material
19. 19.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) lemon juice
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) False (b) True
21. 21.True or false: a small bowl is not needed for the secret lemon message. (a) False (b) True
22. 22.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) warm water (d) a piece of string
25. 25.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) nothing at all (c) it turns to ice (d) lots of fizzy bubbles
26. 26.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
27. 27.⚖️ 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
28. 28.🧺 Which of these is needed for making butter? (a) a battery cell (b) turmeric powder (c) fresh cream (d) yeast
29. 29.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it turns pink (c) it takes much longer (d) it makes salt
30. 30.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) yeast (b) fresh cream (c) a jar with a tight lid (d) cold water to rinse
31. 31.True or false: baking a cake is a change that can be undone. (a) True (b) False
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the same dish (c) sunny or shady place
33. 33.🧺 Which of these is needed for the muddy water filter? (a) muddy water (b) turmeric powder (c) a balloon (d) a battery cell
34. 34.True or false: tamarind water is an acid. (a) False (b) True
35. 35.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) sugar (d) a paper clip
37. 37.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it is cold (c) it is sticky (d) it can burn skin
38. 38.🧺 Do we need a balloon for making butter? (a) not needed (b) needed
39. 39.⚖️ 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
40. 40.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it

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