Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 664 · 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: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
2. 2.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
3. 3.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) they melt (c) no, never (d) yes, they sprout
4. 4.⚖️ 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) True (b) False
5. 5.🧺 Do we need turmeric powder for the secret lemon message? (a) not needed (b) needed
6. 6.True or false: vinegar is needed for the leafy bag test. (a) False (b) True
7. 7.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it wilts and droops (d) it grows faster
8. 8.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) both the same (c) neither of them (d) the hot sunny day
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
10. 10.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) salt water (c) soap solution (d) plain water
11. 11.🔍 Which is the odd one out? (a) cutting the lemon (b) putting the iron away (c) dipping the cotton bud (d) ironing the paper
12. 12.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
13. 13.🧈 Which of these is a change that can be undone? (a) melting ice (b) milk turning to curd (c) cooking an egg (d) browning lemon ink
14. 14.🧺 Do we need muddy water for the muddy water filter? (a) needed (b) not needed
15. 15.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
16. 16.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it can block breathing (c) it is too big (d) it gets wet
17. 17.🧺 Which of these is needed for sprouting seeds? (a) cotton wool (b) a magnet (c) a battery cell (d) turmeric powder
18. 18.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
19. 19.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is hot (d) clear water is sweet
20. 20.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
21. 21.True or false: salt is needed for growing salt crystals. (a) False (b) True
22. 22.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
23. 23.🧺 Do we need turmeric powder for sprouting seeds? (a) needed (b) not needed
24. 24.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
25. 25.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
26. 26.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a mirror (c) sugar (d) vinegar
27. 27.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
28. 28.🪴 Which part of a plant does this job: carry water upward? (a) stem (b) leaves (c) roots (d) flower
29. 29.🪴 Where did the water inside the bag come from? (a) the plastic (b) the leaves (c) the rain (d) the rubber band
30. 30.🌱 Where does a sprouting seed get its first food from? (a) the cotton wool (b) the air (c) the sunlight only (d) food stored in the seed
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a spoon (d) turmeric powder
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) turmeric powder (c) a bowl (d) a jar with a tight lid
35. 35.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) bubbles of gas (c) lumps of butter (d) clear water only
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) True (b) False
37. 37.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) turmeric powder (d) a balloon
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
39. 39.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
40. 40.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow

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