Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 139 · 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 not needed for a seed to sprout? (a) warmth (b) sugar (c) air (d) water
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same glass (b) the filter material (c) the same muddy water (d) the same funnel
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a small bottle (d) a magnet
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 change it (c) we measure it
5. 5.🪴 Which of these is a job of the flower? (a) give out water vapour (b) make seeds (c) hold the plant in soil (d) make food in sunlight
6. 6.True or false: a magnet is not needed for making butter. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) salt
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) white paper strips (d) yeast
9. 9.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
10. 10.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.True or false: curd is a base. (a) True (b) False
13. 13.🧈 What is the watery liquid left after the butter forms? (a) oil (b) honey (c) buttermilk (d) vinegar
14. 14.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) your best clothes (d) an old shirt or apron
15. 15.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) hydrogen (c) carbon dioxide (d) oxygen
16. 16.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it turns yellow (c) so cream does not spill (d) so it gets hot
17. 17.True or false: freezing water is a change that can be undone. (a) False (b) True
18. 18.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rub it hard (c) rinse with clean water (d) add baking soda
19. 19.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the water (c) nothing (d) the mud
20. 20.True or false: salt from sea water is done by evaporating. (a) True (b) False
21. 21.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
22. 22.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.🫗 How do we separate bad grains from rice? (a) evaporating (b) winnowing (c) handpicking (d) filtering
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a battery cell (d) a small bottle
29. 29.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
30. 30.🫧 Which of these is a base? (a) plain water (b) orange juice (c) baking soda water (d) lemon juice
31. 31.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a mirror (c) a magnet (d) a small bowl
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the cream temperature (c) the amount of cream (d) how hard we shake
33. 33.True or false: a magnet is needed for the turmeric test. (a) False (b) True
34. 34.True or false: a funnel or spoon is not needed for the fizzy balloon. (a) True (b) False
35. 35.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) a mirror (d) an adult with an iron
36. 36.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) brown (d) white
37. 37.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they react (b) they freeze (c) they become magnets (d) they float apart
38. 38.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.🪴 Through which part does a plant take in water from the soil? (a) the leaves (b) the flowers (c) the fruits (d) the roots
40. 40.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone

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