Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 453 · 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: dissolving salt is a change that can be undone. (a) False (b) True
2. 2.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
3. 3.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
4. 4.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
5. 5.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
7. 7.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
9. 9.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it grows much faster (d) it turns yellow
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is the one thing we change. (a) False (b) True
13. 13.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a balloon (c) yeast (d) a small bowl
14. 14.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
15. 15.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a funnel or spoon (c) a seed (d) an empty bottle
16. 16.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) vinegar
17. 17.True or false: yeast is needed for the leafy bag test. (a) True (b) False
18. 18.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
19. 19.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
20. 20.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) baking soda water (d) plain water
21. 21.True or false: soil is needed for a seed to sprout. (a) False (b) True
22. 22.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) moong seeds (c) water (d) a balloon
23. 23.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) cotton wool (c) a mirror (d) turmeric powder
24. 24.🧺 Do we need cotton wool for sprouting seeds? (a) not needed (b) needed
25. 25.True or false: a balloon is needed for sprouting seeds. (a) True (b) False
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) fresh cream (c) a battery cell (d) a bowl
28. 28.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a mirror (c) moong seeds (d) cotton wool
29. 29.🧺 Do we need a magnet for the leafy bag test? (a) needed (b) not needed
30. 30.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a comb (c) a funnel or spoon (d) an empty bottle
31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a comb (d) a dropper or spoon
32. 32.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) skip washing
33. 33.⚖️ 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
34. 34.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a magnet (c) a comb (d) vinegar
35. 35.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
36. 36.True or false: baking soda dissolves in water. (a) True (b) False
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) True (b) False
38. 38.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
39. 39.True or false: plain water keeps turmeric yellow. (a) False (b) True
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it

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