Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 400 · 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.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
2. 2.🪴 Which part of a plant does this job: hold the plant in soil? (a) flower (b) roots (c) leaves (d) stem
3. 3.True or false: a magnet is needed for sprouting seeds. (a) False (b) True
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
5. 5.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
6. 6.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) cutting the lemon (c) ironing the paper (d) dipping the cotton bud
7. 7.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) a balloon (c) water (d) moong seeds
8. 8.🔍 Which is the odd one out? (a) melting ice (b) folding paper (c) browning lemon ink (d) freezing water
9. 9.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) salt (d) sugar
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the same bottles (b) the amount of sugar (c) the water temperature (d) the amount of water
11. 11.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
12. 12.🫗 How do we separate salt from sea water? (a) evaporating (b) filtering (c) winnowing (d) handpicking
13. 13.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is what we measure. (a) True (b) False
14. 14.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) throw them at friends (c) feed them to pets (d) never put seeds in mouth
15. 15.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) the paper floats (c) writing stays faint (d) it gets darker
16. 16.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) a magnet
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) how hard we shake (b) the cream temperature (c) time to make butter
18. 18.True or false: a mirror is needed for sprouting seeds. (a) False (b) True
19. 19.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a seed (c) a comb (d) vinegar
20. 20.True or false: dissolving salt is a change that can be undone. (a) False (b) True
21. 21.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is what we measure. (a) True (b) False
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the same kind of bag (c) the size of the plant (d) the kind of plant
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a spoon (d) yeast
24. 24.🫧 Which of these is a base? (a) sugar water (b) plain water (c) tamarind water (d) soap solution
25. 25.True or false: putting the iron away is a job a child can do. (a) False (b) True
26. 26.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
27. 27.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
28. 28.True or false: turmeric powder is needed for making butter. (a) True (b) False
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) yeast (d) salt
30. 30.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) vinegar (b) a rubber band (c) a potted plant (d) a clear plastic bag
31. 31.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
32. 32.🎈 Why does the balloon blow up? (a) outside air gets in (b) vinegar is hot (c) the bottle shrinks (d) gas is made inside
33. 33.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rubber band (c) the leaves (d) the rain
34. 34.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) sugar (c) a funnel or spoon (d) a comb
35. 35.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
36. 36.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
37. 37.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they float apart (c) they become magnets (d) they react
38. 38.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a battery cell (b) cold water to rinse (c) a jar with a tight lid (d) fresh cream
39. 39.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) a mirror (c) a potted plant (d) vinegar
40. 40.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot

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