Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 841 · 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? True or false: the amount of vinegar is what we measure. (a) True (b) False
2. 2.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
3. 3.True or false: table salt dissolves in water. (a) True (b) False
4. 4.🌱 Why do the seeds on dry cotton not sprout? (a) they have no water (b) they have no soil (c) they are too wet (d) they have no salt
5. 5.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
6. 6.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) salty (c) clearer (d) hot
7. 7.🧺 Do we need turmeric powder for sprouting seeds? (a) needed (b) not needed
8. 8.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
9. 9.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
10. 10.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the balloon got cold (c) the bottle got tired (d) an ingredient ran out
11. 11.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) still runny cream (c) butter lumps (d) cheese
12. 12.🌱 What comes out of a moong seed first when it sprouts? (a) a tiny root (b) a flower (c) a fruit (d) a thorn
13. 13.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the same jar (c) the amount of cream (d) the cream temperature
14. 14.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a rubber band (c) a potted plant (d) a mirror
16. 16.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
17. 17.🧺 Do we need a few days for sprouting seeds? (a) not needed (b) needed
18. 18.True or false: ironing the paper is a job for an adult. (a) False (b) True
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a piece of string (d) a magnet
20. 20.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it gets wet (c) it can block breathing (d) it is too big
21. 21.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) green (d) bright blue
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a battery cell (c) baking soda (d) an empty bottle
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a mirror (d) a piece of string
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) yeast (d) warm water
25. 25.🔍 Which is the odd one out? (a) melting ice (b) cooking an egg (c) milk turning to curd (d) baking a cake
26. 26.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
27. 27.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
28. 28.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a battery cell (c) a timer (d) a balloon
29. 29.⚖️ 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 keep it the same (c) we change it
30. 30.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
31. 31.🫗 How do we separate bad grains from rice? (a) winnowing (b) sieving (c) evaporating (d) handpicking
32. 32.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) vinegar (c) a few hours (d) a potted plant
33. 33.🌱 Which of these is needed for a seed to sprout? (a) soil (b) sunlight (c) salt (d) air
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a tray for spills (c) a seed (d) vinegar
35. 35.🧺 Which of these is not needed for making butter? (a) a timer (b) a jar with a tight lid (c) a mirror (d) cold water to rinse
36. 36.True or false: baking soda water is an acid. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) vinegar (d) salt
38. 38.📘 What do we call a seed starting to grow? (a) pollination (b) germination (c) condensation (d) evaporation
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a comb (d) dry yeast

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