Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 23 · 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.True or false: sugar water keeps turmeric yellow. (a) False (b) True
2. 2.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) salt (d) vinegar
3. 3.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so cream does not spill (c) so air gets out (d) so it turns yellow
4. 4.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
5. 5.🧺 Which of these is needed for the fizzy balloon? (a) baking soda (b) a mirror (c) a battery cell (d) a seed
6. 6.True or false: a balloon is needed for the secret lemon message. (a) False (b) True
7. 7.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) a clean glass (c) a funnel (d) muddy water
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is kept the same. (a) False (b) True
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a mirror (d) sugar
10. 10.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) the youngest child (c) any child (d) whoever is fastest
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🧈 Which of these is a change that can be undone? (a) folding paper (b) rusting iron (c) milk turning to curd (d) browning lemon ink
13. 13.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) ignore it (c) rub it hard (d) rinse with clean water
14. 14.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds by a window (c) wet seeds in the dark (d) boiled seeds
15. 15.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) melting butter (d) baking a cake
16. 16.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rain (c) the leaves (d) the rubber band
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
18. 18.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) salt water (d) lemon juice
19. 19.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
20. 20.True or false: baking a cake is a change that can be undone. (a) False (b) True
21. 21.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if shaken (c) yes, if cooled (d) yes, in the dark
22. 22.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
25. 25.🧈 What is the watery liquid left after the butter forms? (a) honey (b) vinegar (c) buttermilk (d) oil
26. 26.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
28. 28.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
29. 29.True or false: freezing water is a change that cannot be undone. (a) False (b) True
30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) sunlight (c) warm water (d) time
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.True or false: a battery cell is needed for the fizzy balloon. (a) False (b) True
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.🧺 Do we need a small bowl for sprouting seeds? (a) not needed (b) needed
37. 37.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
38. 38.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it sinks to the bottom (c) it turns to sand (d) it floats on top
39. 39.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
40. 40.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) melting ice (d) rusting iron

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