Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 927 · 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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
2. 2.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) roots (c) stem (d) leaves
3. 3.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
4. 4.🔍 Which is the odd one out? (a) ironing the paper (b) putting the iron away (c) dipping the cotton bud (d) plugging in the iron
5. 5.True or false: lemon juice is neutral. (a) True (b) False
6. 6.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a tiny living fungus (d) a kind of salt
7. 7.🫗 Which of these is done by filtering? (a) bran from wheat flour (b) tea leaves from tea (c) sugar from sugar water (d) gravel from fine sand
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) the amount of cream (c) time to make butter (d) the same jar
9. 9.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
10. 10.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a jar with a tight lid (c) a bowl (d) a magnet
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
12. 12.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) plain water (d) detergent water
13. 13.True or false: tamarind water is an acid. (a) False (b) True
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) True (b) False
15. 15.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a battery cell (c) sunlight (d) a clear plastic bag
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a comb (b) a tray for spills (c) an empty bottle (d) a funnel or spoon
17. 17.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) turmeric powder (c) yeast (d) a clean glass
18. 18.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) it turns to ice (c) nothing at all (d) lots of fizzy bubbles
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) how dark the writing is (b) the kind of juice (c) the same cotton bud (d) the same paper
20. 20.📘 Is the fizzing a sign that a new substance is made? (a) yes, a new gas forms (b) it is only melting (c) no, nothing changes (d) it is only dissolving
21. 21.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
22. 22.🧺 Which of these is needed for making butter? (a) a battery cell (b) a balloon (c) a mirror (d) cold water to rinse
23. 23.True or false: yeast is needed for the turmeric test. (a) True (b) False
24. 24.True or false: a mirror is needed for sprouting seeds. (a) True (b) False
25. 25.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a mirror (c) a jar with a tight lid (d) a timer
26. 26.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) an adult with an iron (d) a mirror
27. 27.🔍 Which is the odd one out? (a) baking a cake (b) milk turning to curd (c) rusting iron (d) melting ice
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) cotton or cloth (c) a balloon (d) a clean glass
29. 29.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
30. 30.True or false: small pebbles dissolves in water. (a) True (b) False
31. 31.True or false: yeast is needed for growing salt crystals. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) salt (b) time (c) vinegar (d) sunlight
33. 33.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) give out water vapour (c) take in water from soil (d) carry water upward
34. 34.🧈 What is the watery liquid left after the butter forms? (a) vinegar (b) honey (c) buttermilk (d) oil
35. 35.🪴 Which of these is a job of the flower? (a) give out water vapour (b) hold up the leaves (c) make seeds (d) hold the plant in soil
36. 36.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
38. 38.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves stay behind (b) both stay behind (c) tea stays behind (d) leaves pass through
39. 39.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
40. 40.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False

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