Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 541 · 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.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
2. 2.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it grows bigger (c) it turns blue (d) it shrinks
3. 3.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) turmeric powder (c) a funnel (d) a mirror
4. 4.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
5. 5.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) baking soda (c) a comb (d) an empty bottle
6. 6.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) tamarind water (c) lemon juice (d) baking soda water
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
8. 8.🧺 Which of these is needed for making butter? (a) a mirror (b) a battery cell (c) turmeric powder (d) cold water to rinse
9. 9.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a spoon (c) a shallow dish (d) salt
11. 11.True or false: a magnet is something yeast does not need. (a) False (b) True
12. 12.True or false: a mirror is not needed for the muddy water filter. (a) False (b) True
13. 13.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
14. 14.🫧 Which of these is neutral? (a) orange juice (b) lemon juice (c) vinegar (d) plain water
15. 15.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it turns pink (c) it is much faster (d) it makes salt
16. 16.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) food colour (d) sand
17. 17.True or false: cooking oil does not dissolve in water. (a) True (b) False
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sand (d) sugar
20. 20.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) a jar with a tight lid (d) yeast
21. 21.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) a mirror (d) cotton or cloth
22. 22.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) sunny or shady place (c) days to see crystals (d) the same dish
24. 24.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a small bowl (c) a cotton bud (d) a magnet
25. 25.True or false: freezing water is a change that cannot be undone. (a) True (b) False
26. 26.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sugar (d) sunlight
27. 27.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) a spoon (d) salt
29. 29.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing turns green (c) writing stays faint (d) the paper floats
30. 30.True or false: air is not needed for a seed to sprout. (a) False (b) True
31. 31.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it can block breathing (d) it gets wet
32. 32.🧈 Which of these is a change that can be undone? (a) melting ice (b) rusting iron (c) milk turning to curd (d) browning lemon ink
33. 33.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) a battery cell (d) a paper clip
34. 34.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) False (b) True
36. 36.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) False (b) True
37. 37.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
38. 38.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a magnet (c) a balloon (d) water
39. 39.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is smaller (d) the balloon is bigger
40. 40.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face

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