Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 211 · 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.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a small bowl (c) a cotton bud (d) a magnet
2. 2.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
3. 3.True or false: plugging in the iron is a job a child can do. (a) True (b) False
4. 4.🧺 Do we need turmeric powder for the muddy water filter? (a) not needed (b) needed
5. 5.True or false: water is needed for a seed to sprout. (a) True (b) False
6. 6.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
7. 7.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
8. 8.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
9. 9.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
10. 10.⚖️ 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) how hard we shake (c) the cream temperature (d) the same jar
11. 11.True or false: a small bowl is needed for the secret lemon message. (a) False (b) True
12. 12.True or false: folding paper is a change that cannot be undone. (a) False (b) True
13. 13.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
14. 14.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a bowl (c) a balloon (d) fresh cream
15. 15.True or false: husk from rice grain is done by sieving. (a) True (b) False
16. 16.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
17. 17.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a rubber band (c) sunlight (d) vinegar
18. 18.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a battery cell (d) an adult with an iron
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
21. 21.True or false: a comb is needed for the fizzy balloon. (a) False (b) True
22. 22.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) almost nothing (d) dark brown words
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.🔍 Which is the odd one out? (a) baking a cake (b) melting ice (c) cooking an egg (d) browning lemon ink
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.True or false: sawdust does not dissolve in water. (a) True (b) False
27. 27.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
28. 28.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with a hot glue gun (d) with sharp wire
29. 29.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) salt (d) sugar
30. 30.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) writing the message (c) ironing the paper (d) putting the iron away
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is the one thing we change. (a) True (b) False
32. 32.True or false: a magnet is needed for the fizzy balloon. (a) True (b) False
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True
34. 34.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) it shrinks (c) it grows bigger (d) there is no change
35. 35.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold kills sugar (d) cold slows yeast down
36. 36.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it can block breathing (d) it gets wet
37. 37.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
38. 38.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same place (b) the number of seeds (c) wet or dry cotton (d) how many seeds sprout
39. 39.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) moong seeds (c) a magnet (d) a small bowl
40. 40.🧺 Do we need cotton wool for sprouting seeds? (a) not needed (b) needed

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