Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 680 · 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 needed for the muddy water filter? (a) a magnet (b) a mirror (c) muddy water (d) a balloon
2. 2.True or false: sugar is something yeast does not need. (a) True (b) False
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the filter material (b) the amount poured (c) the same funnel (d) how clear the water is
4. 4.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) soap solution (c) a dropper or spoon (d) turmeric powder
5. 5.True or false: dissolving salt is a change that can be undone. (a) False (b) True
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) a balloon (d) a comb
7. 7.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) salt crystals (c) tiny water drops (d) nothing at all
8. 8.True or false: bran from wheat flour is done by handpicking. (a) False (b) True
9. 9.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is hot (d) soap is magnetic
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) yeast (c) sunlight (d) a few hours
12. 12.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, in the dark (c) yes, if shaken (d) yes, if cooled
13. 13.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.🔍 Which is the odd one out? (a) putting the iron away (b) reading the message (c) ironing the paper (d) plugging in the iron
16. 16.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) vinegar (c) baking soda water (d) salt water
17. 17.🧺 Do we need a mirror for the leafy bag test? (a) needed (b) not needed
18. 18.True or false: a magnet is needed for the fizzy balloon. (a) True (b) False
19. 19.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) a mirror (d) dry yeast
21. 21.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a funnel or spoon (c) a battery cell (d) an empty bottle
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.True or false: sand dissolves in water. (a) True (b) False
24. 24.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) False (b) True
26. 26.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is kept the same. (a) False (b) True
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a comb (d) a balloon
28. 28.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
29. 29.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a battery cell (c) turmeric powder (d) a balloon
31. 31.True or false: yeast is needed for sprouting seeds. (a) False (b) True
32. 32.🧺 Which of these is needed for the leafy bag test? (a) a rubber band (b) a mirror (c) vinegar (d) a magnet
33. 33.True or false: a timer is not needed for making butter. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) lemon juice
35. 35.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
36. 36.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
37. 37.🫗 How do we separate tea leaves from tea? (a) winnowing (b) handpicking (c) sieving (d) filtering
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the amount of vinegar (c) spoons of baking soda
39. 39.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is hot (d) clear water is sweet
40. 40.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) lumps of butter (c) sugar crystals (d) clear water only

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