Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 932 · 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.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) it turns to cheese (c) more butter forms (d) it turns blue
2. 2.🍋 Which of these steps is a job a child can do? (a) letting the paper dry (b) putting the iron away (c) cutting the lemon (d) ironing the paper
3. 3.True or false: baking soda is not needed for the fizzy balloon. (a) True (b) False
4. 4.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
5. 5.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
6. 6.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) vinegar (d) salt
7. 7.True or false: a battery cell is needed for the leafy bag test. (a) True (b) False
8. 8.True or false: a small bowl is not needed for sprouting seeds. (a) False (b) True
9. 9.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a battery cell (c) water (d) a small bowl
10. 10.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
12. 12.⚖️ 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 kind of balloon (c) spoons of baking soda (d) the amount of vinegar
13. 13.⚖️ 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) the cream temperature (d) the same jar
14. 14.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a magnet (c) dry yeast (d) warm water
16. 16.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
17. 17.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
18. 18.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is the one thing we change. (a) False (b) True
19. 19.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
20. 20.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a funnel or spoon (c) a comb (d) an empty bottle
21. 21.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) cutting the lemon (c) writing the message (d) plugging in the iron
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) salt water (c) baking soda water (d) vinegar
23. 23.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) only an adult (c) any child (d) whoever is fastest
24. 24.True or false: curd is neutral. (a) False (b) True
25. 25.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🔍 Which is the odd one out? (a) melting butter (b) freezing water (c) browning lemon ink (d) folding paper
28. 28.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
29. 29.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) melting ice (d) freezing water
30. 30.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a magnet (c) vinegar (d) a potted plant
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the ironing time (b) how dark the writing is (c) the same cotton bud (d) the same paper
32. 32.⚖️ 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
33. 33.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
34. 34.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) baking soda water (d) detergent water
35. 35.True or false: yeast is not needed for the turmeric test. (a) False (b) True
36. 36.🧈 What is the watery liquid left after the butter forms? (a) buttermilk (b) oil (c) honey (d) vinegar
37. 37.True or false: fresh cream is needed for making butter. (a) True (b) False
38. 38.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a battery cell (c) fresh cream (d) cold water to rinse
39. 39.🧺 Do we need a small bowl for sprouting seeds? (a) not needed (b) needed
40. 40.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form

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