Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 109 · 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.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
2. 2.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
3. 3.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) a small bowl (c) an adult with an iron (d) a battery cell
5. 5.🌱 Will these sprout: seeds on dry cotton? (a) does not sprout (b) sprouts
6. 6.True or false: a jar with a tight lid is not needed for making butter. (a) True (b) False
7. 7.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
8. 8.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) moong seeds (c) turmeric powder (d) water
9. 9.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
10. 10.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) salt (d) sunlight
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it wilts and droops (c) it flowers more (d) it grows faster
13. 13.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
14. 14.True or false: sugar water keeps turmeric yellow. (a) False (b) True
15. 15.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) a rainbow (d) almost nothing
16. 16.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) glucose powder (d) small pebbles
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) False (b) True
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is what we measure. (a) True (b) False
19. 19.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
20. 20.True or false: a clean glass is needed for the muddy water filter. (a) False (b) True
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the light we look in (d) the turmeric paper
22. 22.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
23. 23.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
24. 24.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) plugging in the iron (c) dipping the cotton bud (d) putting the iron away
25. 25.True or false: lemon juice is a base. (a) False (b) True
26. 26.True or false: a small bowl is not needed for the secret lemon message. (a) True (b) False
27. 27.⚖️ 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 cream temperature (d) how hard we shake
28. 28.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
29. 29.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
30. 30.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a battery cell (c) a funnel or spoon (d) a tray for spills
31. 31.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) as tight as possible (c) with sharp wire (d) gently, not too tight
32. 32.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves stay behind (c) tea stays behind (d) leaves pass through
33. 33.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) roots (c) stomata (d) petals
34. 34.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of sugar (c) size of the balloon (d) the amount of water
36. 36.True or false: melting ice is a change that cannot be undone. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) cutting the lemon (b) ironing the paper (c) dipping the cotton bud (d) plugging in the iron
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the same dish
39. 39.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
40. 40.🌱 What comes out of a moong seed first when it sprouts? (a) a tiny root (b) a flower (c) a fruit (d) a thorn

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