Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 174 · 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.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) a magnet (c) a balloon (d) sand and pebbles
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a battery cell (c) lemon juice (d) a comb
4. 4.🔍 Which is the odd one out? (a) soap solution (b) curd (c) tamarind water (d) vinegar
5. 5.🧺 Which of these is needed for sprouting seeds? (a) cotton wool (b) a balloon (c) a magnet (d) turmeric powder
6. 6.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
8. 8.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) a battery cell (c) a mirror (d) moong seeds
9. 9.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.True or false: curd is a base. (a) False (b) True
12. 12.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
13. 13.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
14. 14.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) tamarind water (d) baking soda water
16. 16.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) plugging in the iron (c) cutting the lemon (d) letting the paper dry
17. 17.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
18. 18.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
19. 19.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it is too big (c) it gets wet (d) it changes colour
20. 20.True or false: a magnet is needed for sprouting seeds. (a) True (b) False
21. 21.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) soil (c) water (d) air
22. 22.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a balloon (b) muddy water (c) a funnel (d) a clean glass
24. 24.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) cheese (c) butter lumps (d) still runny cream
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
26. 26.🌱 Is sugar needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) size of the balloon (d) the same bottles
28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) a dropper or spoon (d) water
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the same cotton bud (c) how dark the writing is
30. 30.🫧 Which of these is neutral? (a) sugar water (b) orange juice (c) baking soda water (d) tamarind water
31. 31.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
32. 32.⚖️ 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 measure it (c) we change it
33. 33.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
34. 34.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much less water (c) exactly the same (d) much more water
35. 35.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) baking soda water (d) lemon juice
38. 38.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
39. 39.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
40. 40.True or false: a spoon is needed for growing salt crystals. (a) True (b) False

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