Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 106 · 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.🧺 Do we need cold water to rinse for making butter? (a) not needed (b) needed
2. 2.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
3. 3.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it sinks to the bottom (c) it dissolves (d) it floats on top
4. 4.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
5. 5.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) neither of them (c) the cool cloudy day (d) the hot sunny day
6. 6.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) yeast (c) white paper (d) a cotton bud
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) shake it near your face (c) keep it away from eyes (d) seal it in a glass jar
9. 9.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) sugar (c) a seed (d) a funnel or spoon
10. 10.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold kills sugar (d) cold makes it pink
11. 11.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
12. 12.🫧 Which of these is a base? (a) curd (b) sugar water (c) baking soda water (d) tamarind water
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same paper (b) the kind of juice (c) the ironing time (d) the same cotton bud
14. 14.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) it fills with soil (d) much more water
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a shallow dish (d) a balloon
16. 16.True or false: make seeds is a job of the roots. (a) False (b) True
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a balloon (d) turmeric powder
18. 18.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) flower (c) roots (d) leaves
19. 19.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
20. 20.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
21. 21.True or false: detergent water is a base. (a) False (b) True
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the same bottles (c) the amount of yeast (d) the water temperature
23. 23.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) lick your fingers (d) rub your eyes
24. 24.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so it turns yellow (c) so air gets out (d) so cream does not spill
25. 25.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it turns blue (c) it grows faster (d) it wilts and droops
26. 26.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.🔍 Which is the odd one out? (a) cooking an egg (b) melting butter (c) melting ice (d) freezing water
29. 29.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) sun or shade (c) the size of the plant
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 kept the same. (a) True (b) False
32. 32.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
33. 33.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.True or false: cold water to rinse is needed for making butter. (a) False (b) True
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.True or false: time is something yeast does not need. (a) True (b) False
37. 37.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wash hands afterwards (c) wipe hands on face (d) lick your fingers
39. 39.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) food colour (d) small pebbles
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of yeast (c) the amount of sugar (d) the amount of water

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