Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 401 · 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) lemon juice (c) a cotton bud (d) a battery cell
2. 2.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) rinse with clean water (c) add baking soda (d) ignore it
3. 3.True or false: a jar with a tight lid is not needed for making butter. (a) False (b) True
4. 4.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a potted plant (c) sunlight (d) a mirror
5. 5.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) yes, they sprout (c) no, never (d) they melt
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.True or false: rusting iron is a change that can be undone. (a) False (b) True
8. 8.🧺 Do we need a magnet for making butter? (a) needed (b) not needed
9. 9.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a seed (c) a tray for spills (d) sugar
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.🔍 Which is the odd one out? (a) curd (b) tamarind water (c) soap solution (d) lemon juice
12. 12.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
13. 13.True or false: water is needed for sprouting seeds. (a) True (b) False
14. 14.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) True (b) False
15. 15.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) to colour it (d) it is food for yeast
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.True or false: tamarind water is an acid. (a) False (b) True
18. 18.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) melting ice (d) cooking an egg
19. 19.True or false: dipping the cotton bud is a job a child can do. (a) True (b) False
20. 20.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) a magnet
21. 21.🫧 Which of these is neutral? (a) orange juice (b) tamarind water (c) soap solution (d) sugar water
22. 22.🧂 Which of these dissolves in water? (a) small pebbles (b) food colour (c) sand (d) sawdust
23. 23.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
24. 24.True or false: folding paper is a change that cannot be undone. (a) True (b) False
25. 25.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) yeast (c) cotton wool (d) a magnet
26. 26.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a mirror (b) a small bowl (c) white paper (d) an adult with an iron
27. 27.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) sugar (d) cooking oil
28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) a mirror (d) soap solution
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
30. 30.True or false: plain water keeps turmeric yellow. (a) True (b) False
31. 31.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) True (b) False
32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) turmeric powder (d) salt
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it gets wet (c) it is too big (d) it can block breathing
37. 37.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) cotton wool (c) turmeric powder (d) moong seeds
38. 38.🧂 Which of these dissolves in water? (a) small pebbles (b) baking soda (c) sawdust (d) cooking oil
39. 39.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
40. 40.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True

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