Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 731 · 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: cutting the lemon is a job a child can do. (a) True (b) False
2. 2.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) melting butter (d) dissolving salt
3. 3.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
4. 4.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
5. 5.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a mirror (c) a magnet (d) an empty bottle
6. 6.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) a rainbow (c) dark brown words (d) almost nothing
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) warm water (d) a spoon
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
9. 9.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a bowl (c) a balloon (d) fresh cream
10. 10.True or false: melting ice is a change that cannot be undone. (a) True (b) False
11. 11.🧺 Do we need turmeric powder for making butter? (a) needed (b) not needed
12. 12.🧺 Do we need a magnet for the leafy bag test? (a) not needed (b) needed
13. 13.🪴 Which part of a plant does this job: make food in sunlight? (a) roots (b) flower (c) stem (d) leaves
14. 14.🔍 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
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) amount of water drops (b) the time we wait (c) sun or shade (d) the same kind of bag
16. 16.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
18. 18.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) green (d) blue
19. 19.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
20. 20.🫧 Which of these is an acid? (a) baking soda water (b) detergent water (c) salt water (d) orange juice
21. 21.⚖️ 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
22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
23. 23.🔍 Which is the odd one out? (a) cooking an egg (b) browning lemon ink (c) rusting iron (d) melting ice
24. 24.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
25. 25.True or false: hold the plant in soil is a job of the leaves. (a) False (b) True
26. 26.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) a few days (c) a mirror (d) water
27. 27.🧺 Do we need muddy water for the muddy water filter? (a) needed (b) not needed
28. 28.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) clear water only (c) bubbles of gas (d) lumps of butter
29. 29.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is what we measure. (a) True (b) False
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) gently, not too tight (d) with a hot glue gun
34. 34.🧺 Do we need a clean glass for the muddy water filter? (a) not needed (b) needed
35. 35.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) the gas froze (d) an ingredient ran out
36. 36.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to colour rice (c) to make bread rise (d) to wash dishes
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) turmeric powder (d) dry yeast
38. 38.True or false: a clear plastic bag is needed for the leafy bag test. (a) True (b) False
39. 39.True or false: yeast is needed for the secret lemon message. (a) False (b) True
40. 40.True or false: small stones from dal is done by sieving. (a) True (b) False

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