Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 316 · 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.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
3. 3.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) air (c) salt (d) water
4. 4.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) a magnet (c) fresh cream (d) a timer
5. 5.🧺 Do we need turmeric powder for the leafy bag test? (a) not needed (b) needed
6. 6.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
7. 7.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wash hands afterwards (d) wipe hands on face
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same funnel (b) the filter material (c) the amount poured (d) the same muddy water
9. 9.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a pressure cooker (b) a mathani (churner) (c) a sieve (d) a rolling pin
10. 10.🧺 Which of these is not needed for sprouting seeds? (a) cotton wool (b) a mirror (c) moong seeds (d) a few days
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) never put seeds in mouth (c) eat a few to check (d) feed them to pets
15. 15.🫧 Which of these is neutral? (a) lemon juice (b) vinegar (c) plain water (d) orange juice
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
17. 17.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) writing the message (c) letting the paper dry (d) reading the message
18. 18.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) sugar (d) an empty bottle
19. 19.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) writing stays faint (c) it gets darker (d) the paper floats
21. 21.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) yes, they sprout (c) they melt (d) no, never
22. 22.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a magnet (d) sugar
24. 24.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) yeast (c) a battery cell (d) a mirror
25. 25.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a mirror (c) turmeric powder (d) a battery cell
26. 26.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) helium (c) oxygen (d) hydrogen
27. 27.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) cooking an egg (d) melting ice
28. 28.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) salt water
29. 29.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) a paper clip (d) sugar
30. 30.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) baking soda (d) chalk powder
31. 31.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
32. 32.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
33. 33.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is salty (c) clear water is hot (d) germs are invisible
34. 34.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
35. 35.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
36. 36.🌱 Seeds need water, air and ___ to sprout. (a) salt (b) sugar (c) soil (d) warmth
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a comb (d) a balloon
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🧺 Do we need turmeric powder for making butter? (a) needed (b) not needed
40. 40.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution

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