Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 629 · 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) salt water (c) baking soda water (d) curd
2. 2.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) the amount of water (c) the kind of salt (d) sunny or shady place
4. 4.🔍 Which is the odd one out? (a) ironing the paper (b) putting the iron away (c) plugging in the iron (d) writing the message
5. 5.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a comb (b) a funnel or spoon (c) a tray for spills (d) a balloon
8. 8.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) freezing water (d) melting butter
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) False (b) True
10. 10.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
11. 11.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) gently, not too tight (c) as tight as possible (d) with a hot glue gun
12. 12.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
13. 13.🔍 Which is the odd one out? (a) warmth (b) water (c) sugar (d) air
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a mirror (d) salt
15. 15.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) water (c) a dropper or spoon (d) white paper strips
16. 16.🍋 Secret message: who does this step — writing the message? (a) a child can do it (b) an adult does it
17. 17.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it can block breathing (c) it changes colour (d) it is too big
18. 18.True or false: sugar is needed for a seed to sprout. (a) True (b) False
19. 19.🪴 Which of these is a job of the stem? (a) hold up the leaves (b) make seeds (c) make food in sunlight (d) take in water from soil
20. 20.🌱 Is sugar needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
21. 21.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no salt (c) they have no water (d) they have no soil
22. 22.🌱 Will these sprout: wet seeds in the dark? (a) sprouts (b) does not sprout
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) spoons of baking soda (b) the kind of balloon (c) size of the balloon (d) the same bottle
24. 24.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rinse with clean water (d) rub it hard
25. 25.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) muddy water (c) turmeric powder (d) cotton or cloth
26. 26.⚖️ 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 time we wait (c) amount of water drops
27. 27.True or false: a magnet is something yeast needs. (a) False (b) True
28. 28.🪴 Which part of a plant does this job: hold the plant in soil? (a) flower (b) leaves (c) roots (d) stem
29. 29.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
30. 30.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a seed (c) a balloon (d) a magnet
31. 31.🔍 Which is the odd one out? (a) soil (b) sugar (c) salt (d) air
32. 32.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) salt (d) vinegar
33. 33.🫧 Which of these is an acid? (a) baking soda water (b) soap solution (c) salt water (d) curd
34. 34.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a cotton bud (c) a mirror (d) yeast
35. 35.🌱 Which of these sprouts in a few days? (a) wet seeds by a window (b) boiled seeds (c) seeds in the freezer (d) seeds on dry cotton
36. 36.🍋 Which of these steps is a job a child can do? (a) reading the message (b) ironing the paper (c) putting the iron away (d) plugging in the iron
37. 37.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) soap solution (d) a balloon
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.True or false: carry water upward is a job of the flower. (a) False (b) True
40. 40.True or false: bran from wheat flour is done by sieving. (a) True (b) False

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