Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 622 · 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 keep it the same (b) we measure it (c) we change it
2. 2.True or false: baking soda water is a base. (a) True (b) False
3. 3.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
4. 4.🫗 How do we separate sugar from sugar water? (a) filtering (b) winnowing (c) evaporating (d) handpicking
5. 5.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold water is heavy (d) cold slows yeast down
6. 6.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
7. 7.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same bowls (b) wet or dry cotton (c) how many seeds sprout
8. 8.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
9. 9.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) turmeric powder (d) salt
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) the same paper (c) how dark the writing is (d) the kind of juice
12. 12.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
13. 13.🔍 Which is the odd one out? (a) putting the iron away (b) ironing the paper (c) cutting the lemon (d) letting the paper dry
14. 14.True or false: orange juice is a base. (a) True (b) False
15. 15.🧺 Do we need a balloon for the secret lemon message? (a) needed (b) not needed
16. 16.True or false: melting butter is a change that cannot be undone. (a) True (b) False
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) the cream temperature (c) how hard we shake (d) time to make butter
18. 18.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) sugar water (d) baking soda water
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
22. 22.True or false: a jar with a tight lid is needed for making butter. (a) False (b) True
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) False (b) True
26. 26.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
27. 27.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
28. 28.True or false: lemon juice is an acid. (a) False (b) True
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) the same paper (c) the same cotton bud (d) the kind of juice
30. 30.🔍 Which is the odd one out? (a) rusting iron (b) melting ice (c) melting butter (d) freezing water
31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is kept the same. (a) True (b) False
33. 33.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
34. 34.True or false: salt is something yeast needs. (a) True (b) False
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
36. 36.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) baking soda (d) sawdust
37. 37.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) an empty bottle (d) a comb
39. 39.🧂 Which of these dissolves in water? (a) sugar (b) small pebbles (c) sawdust (d) chalk powder
40. 40.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar

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