Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 576 · 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.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it changes colour (d) it can block breathing
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is what we measure. (a) True (b) False
3. 3.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) no, it stays brown (c) yes, in the dark (d) yes, if cooled
6. 6.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the liquid we test (d) the number of drops
8. 8.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the turmeric test? (a) water (b) a balloon (c) a magnet (d) a battery cell
10. 10.True or false: melting butter is a change that can be undone. (a) True (b) False
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) ironing the paper (b) plugging in the iron (c) cutting the lemon (d) reading the message
13. 13.🧺 Which of these is needed for the fizzy balloon? (a) an empty bottle (b) a magnet (c) a comb (d) a battery cell
14. 14.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) salt (d) sunlight
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
17. 17.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
18. 18.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
19. 19.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the amount of vinegar (b) spoons of baking soda (c) size of the balloon
22. 22.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
23. 23.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) turmeric powder (c) a magnet (d) white paper strips
24. 24.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
25. 25.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it grows bigger (c) there is no change (d) it turns blue
26. 26.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) rub your eyes (c) skip washing (d) lick your fingers
27. 27.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
28. 28.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
29. 29.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) shake it near your face (d) keep it away from eyes
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) salt (d) a battery cell
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) detergent water (d) salt water
33. 33.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
34. 34.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
35. 35.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a comb (c) a funnel or spoon (d) an empty bottle
36. 36.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) vinegar (c) an empty bottle (d) a magnet
37. 37.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
38. 38.True or false: plugging in the iron is a job for an adult. (a) True (b) False
39. 39.🫗 How do we separate bran from wheat flour? (a) handpicking (b) winnowing (c) sieving (d) filtering
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) False (b) True

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