Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 173 · 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.🫧 Which of these is neutral? (a) vinegar (b) sugar water (c) baking soda water (d) curd
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.True or false: baking soda water is an acid. (a) False (b) True
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) water (c) air (d) sunlight
6. 6.True or false: freezing water is a change that can be undone. (a) True (b) False
7. 7.🧺 Which of these is not needed for the turmeric test? (a) water (b) a battery cell (c) white paper strips (d) lemon juice
8. 8.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
10. 10.True or false: give out water vapour is a job of the roots. (a) False (b) True
11. 11.🫗 Which of these is done by winnowing? (a) bad grains from rice (b) husk from rice grain (c) mud from water (d) salt from sea water
12. 12.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the balloon got cold (c) the bottle got tired (d) the gas froze
13. 13.True or false: a small bowl is needed for sprouting seeds. (a) False (b) True
14. 14.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) the same kind of bag (c) amount of water drops
16. 16.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) turmeric powder (c) yeast (d) sand and pebbles
17. 17.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) chemical (d) physical
18. 18.⚖️ 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 the one thing we change. (a) True (b) False
19. 19.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) putting the iron away (c) plugging in the iron (d) reading the message
20. 20.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.True or false: vinegar is an acid. (a) False (b) True
23. 23.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) rub your eyes (d) wash your hands
24. 24.True or false: yeast is needed for the secret lemon message. (a) True (b) False
25. 25.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
26. 26.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) vinegar (d) salt water
27. 27.True or false: make seeds is a job of the roots. (a) True (b) False
28. 28.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) the water temperature (c) size of the balloon (d) the amount of water
31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it stays yellow (d) it turns green
32. 32.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) False (b) True
34. 34.True or false: a timer is needed for making butter. (a) False (b) True
35. 35.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
36. 36.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
37. 37.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
38. 38.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
40. 40.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) folding paper (d) baking a cake

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