Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 855 · 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.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is sweet (d) clear water is hot
2. 2.🔍 Which is the odd one out? (a) dipping the cotton bud (b) ironing the paper (c) cutting the lemon (d) putting the iron away
3. 3.True or false: salt is needed for growing salt crystals. (a) False (b) True
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a funnel or spoon (c) a tray for spills (d) a battery cell
5. 5.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
6. 6.🪴 Which part of a plant does this job: make seeds? (a) leaves (b) stem (c) roots (d) flower
7. 7.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
8. 8.🛟 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
9. 9.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
10. 10.🧺 Which of these is needed for the leafy bag test? (a) a rubber band (b) turmeric powder (c) yeast (d) a battery cell
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
12. 12.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) salt water (d) soap solution
13. 13.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the number of drops
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
17. 17.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) it grows faster (d) the yeast is killed
18. 18.🫗 How do we separate small stones from dal? (a) evaporating (b) sieving (c) handpicking (d) winnowing
19. 19.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) lick your fingers (c) wipe hands on face (d) nothing is needed
20. 20.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) detergent water (c) lemon juice (d) sugar water
21. 21.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) seal it in a glass jar (d) shake it near your face
22. 22.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) True (b) False
23. 23.🧺 Do we need cold water to rinse for making butter? (a) needed (b) not needed
24. 24.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
26. 26.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) the hot sunny day (c) both the same (d) the cool cloudy day
27. 27.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
28. 28.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
29. 29.🔍 Which is the odd one out? (a) reading the message (b) cutting the lemon (c) putting the iron away (d) ironing the paper
30. 30.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
31. 31.True or false: bran from wheat flour is done by evaporating. (a) False (b) True
32. 32.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it can block breathing (c) it is too big (d) it gets wet
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) an adult with an iron (c) a battery cell (d) lemon juice
34. 34.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed
35. 35.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
36. 36.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) lemon juice (d) baking soda water
37. 37.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
38. 38.True or false: seeds in the freezer does not sprout. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) vinegar (b) salt (c) warm water (d) sunlight
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same

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