Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 434 · 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 a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is the one thing we change. (a) False (b) True
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) throw it at a wall (d) put it in your mouth
3. 3.True or false: table salt dissolves in water. (a) True (b) False
4. 4.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the same paper (c) the kind of juice
6. 6.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it can block breathing (d) it changes colour
7. 7.True or false: chalk powder does not dissolve in water. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) vinegar (b) curd (c) lemon juice (d) salt water
9. 9.🔍 Which is the odd one out? (a) sand (b) sugar (c) baking soda (d) food colour
10. 10.True or false: a clean glass is not needed for the muddy water filter. (a) True (b) False
11. 11.🧺 Do we need a magnet for the leafy bag test? (a) needed (b) not needed
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.True or false: moong seeds is not needed for sprouting seeds. (a) True (b) False
14. 14.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
15. 15.True or false: air is not needed for a seed to sprout. (a) True (b) False
16. 16.True or false: putting the iron away is a job for an adult. (a) False (b) True
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) False (b) True
20. 20.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🔍 Which is the odd one out? (a) folding paper (b) baking a cake (c) melting ice (d) dissolving salt
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a cotton bud (c) yeast (d) lemon juice
24. 24.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
25. 25.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) air from outside (d) steam
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the water temperature (c) the amount of yeast (d) size of the balloon
29. 29.True or false: freezing water is a change that can be undone. (a) True (b) False
30. 30.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
31. 31.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) dissolving salt (d) cooking an egg
32. 32.True or false: vinegar is not needed for the leafy bag test. (a) True (b) False
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) turmeric powder (d) a shallow dish
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) yeast (d) a spoon
35. 35.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) shake it near your face (d) keep it away from eyes
36. 36.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) it turns blue (c) more butter forms (d) no butter forms
37. 37.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) blue (c) brown (d) green
38. 38.🔍 Which is the odd one out? (a) reading the message (b) writing the message (c) dipping the cotton bud (d) putting the iron away
39. 39.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) milk turning to curd (d) dissolving salt
40. 40.🧺 Do we need a mirror for the leafy bag test? (a) needed (b) not needed

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