Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 14 · 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.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) True (b) False
3. 3.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) True (b) False
5. 5.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a comb (c) an empty bottle (d) baking soda
6. 6.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) roots (c) stomata (d) petals
7. 7.🔍 Which is the odd one out? (a) water (b) warmth (c) air (d) soil
8. 8.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
10. 10.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a mirror (c) a balloon (d) a funnel or spoon
11. 11.True or false: hold up the leaves is a job of the stem. (a) True (b) False
12. 12.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
13. 13.🧺 Do we need water for sprouting seeds? (a) needed (b) not needed
14. 14.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) as tight as possible (d) gently, not too tight
15. 15.🫗 How do we separate husk from rice grain? (a) handpicking (b) sieving (c) evaporating (d) winnowing
16. 16.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
17. 17.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) vinegar (c) an empty bottle (d) sugar
18. 18.🫗 How do we separate salt from sea water? (a) filtering (b) handpicking (c) evaporating (d) sieving
19. 19.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) neither of them (c) the hot sunny day (d) both the same
20. 20.True or false: a mirror is needed for the secret lemon message. (a) True (b) False
21. 21.True or false: vinegar is needed for the leafy bag test. (a) True (b) False
22. 22.🫧 Which of these is an acid? (a) vinegar (b) baking soda water (c) plain water (d) sugar water
23. 23.⚖️ 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 change it (b) we measure it (c) we keep it the same
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) days to see crystals (c) sunny or shady place
25. 25.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) shake it near your face (c) seal it in a glass jar (d) keep it away from eyes
26. 26.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) give out water vapour (c) take in water from soil (d) hold up the leaves
27. 27.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) muddier (c) hot (d) salty
28. 28.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold water is heavy (d) cold makes it pink
29. 29.🫗 How do we separate tea leaves from tea? (a) sieving (b) handpicking (c) filtering (d) evaporating
30. 30.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) sugar
31. 31.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) moong seeds (c) a few days (d) turmeric powder
32. 32.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🧺 Which of these is needed for making butter? (a) turmeric powder (b) fresh cream (c) a mirror (d) a magnet
35. 35.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
36. 36.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
37. 37.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
38. 38.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
39. 39.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) reading the message (c) cutting the lemon (d) putting the iron away
40. 40.🔍 Which is the odd one out? (a) sugar (b) warm water (c) salt (d) time

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