Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 193 · 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 a base? (a) plain water (b) vinegar (c) tamarind water (d) baking soda water
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) warm water (d) a balloon
3. 3.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
4. 4.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) sunlight (c) vinegar (d) a rubber band
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) sun or shade (c) the same kind of bag (d) the time we wait
6. 6.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) both the same (c) the hot sunny day (d) the cool cloudy day
7. 7.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, if cooled (c) no, it stays brown (d) yes, in the dark
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) False (b) True
11. 11.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
12. 12.True or false: turmeric powder is needed for sprouting seeds. (a) False (b) True
13. 13.🧺 Do we need a bowl for making butter? (a) not needed (b) needed
14. 14.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
15. 15.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) it turns to ice (c) nothing at all (d) lots of fizzy bubbles
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.True or false: vinegar is not needed for the leafy bag test. (a) True (b) False
18. 18.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
19. 19.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a battery cell (c) yeast (d) a clear plastic bag
20. 20.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) a balloon (d) an adult with an iron
23. 23.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
24. 24.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) the filter material (c) how clear the water is (d) the amount poured
27. 27.🧈 Which of these is a change that can be undone? (a) melting butter (b) cooking an egg (c) baking a cake (d) rusting iron
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) the iron setting (c) the ironing time (d) how dark the writing is
29. 29.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a magnet (b) cotton wool (c) moong seeds (d) water
30. 30.True or false: vinegar is neutral. (a) True (b) False
31. 31.🛟 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
32. 32.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) cold water to rinse (c) a bowl (d) a jar with a tight lid
33. 33.True or false: seeds in the freezer sprouts in a few days. (a) False (b) True
34. 34.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is kept the same. (a) False (b) True
36. 36.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
37. 37.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) sand and pebbles (c) a battery cell (d) a funnel
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) an indicator (d) a prism

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