Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 310 · 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 a change that cannot be undone? (a) melting ice (b) cooking an egg (c) melting butter (d) folding paper
2. 2.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) soap solution (d) a magnet
4. 4.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
5. 5.True or false: give out water vapour is a job of the roots. (a) True (b) False
6. 6.True or false: fresh cream is not needed for making butter. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) cooking an egg (b) freezing water (c) milk turning to curd (d) browning lemon ink
8. 8.True or false: chaff from wheat grain is done by filtering. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) salt (b) water (c) soil (d) sugar
10. 10.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed
11. 11.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of salt (d) a kind of sugar
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
13. 13.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
14. 14.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
15. 15.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) True (b) False
17. 17.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
18. 18.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) no, it stays brown (c) yes, if shaken (d) yes, in the dark
19. 19.📘 Is the fizzing a sign that a new substance is made? (a) yes, a new gas forms (b) no, nothing changes (c) it is only melting (d) it is only dissolving
20. 20.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) turmeric powder (d) muddy water
21. 21.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it can block breathing (d) it gets wet
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the same paper (c) the ironing time (d) the same cotton bud
23. 23.🫧 Which of these is neutral? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🛟 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
26. 26.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a battery cell (c) a potted plant (d) a magnet
27. 27.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) baking soda (d) glucose powder
28. 28.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a clear plastic bag (c) yeast (d) a few hours
29. 29.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
30. 30.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
31. 31.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same place (b) wet or dry cotton (c) how many seeds sprout
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on wet cotton (c) boiled seeds (d) seeds on dry cotton
34. 34.⚖️ 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 measure it (c) we keep it the same
35. 35.🧈 What is the watery liquid left after the butter forms? (a) buttermilk (b) vinegar (c) oil (d) honey
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we change it (c) we measure it
37. 37.🔍 Which is the odd one out? (a) reading the message (b) writing the message (c) plugging in the iron (d) dipping the cotton bud
38. 38.True or false: moong seeds is not needed for sprouting seeds. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) cutting the lemon (b) putting the iron away (c) ironing the paper (d) letting the paper dry
40. 40.True or false: vinegar is a base. (a) True (b) False

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