Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 322 · 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: white paper is needed for the secret lemon message. (a) True (b) False
2. 2.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) sniff each bottle hard (d) use only kitchen items
3. 3.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a potted plant (c) a clear plastic bag (d) turmeric powder
4. 4.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
7. 7.True or false: a magnet is needed for making butter. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) curd (b) salt water (c) sugar water (d) plain water
9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
10. 10.True or false: vinegar is neutral. (a) False (b) True
11. 11.🪴 Which of these is a job of the roots? (a) give out water vapour (b) make food in sunlight (c) hold up the leaves (d) take in water from soil
12. 12.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) the yeast is killed (d) it turns to sugar
13. 13.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
14. 14.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
15. 15.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) stomata (b) veins (c) petals (d) roots
16. 16.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) lemon juice (c) a mirror (d) a magnet
17. 17.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) True (b) False
18. 18.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
19. 19.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
20. 20.🫧 Which of these is an acid? (a) baking soda water (b) tamarind water (c) salt water (d) plain water
21. 21.True or false: sawdust does not dissolve in water. (a) True (b) False
22. 22.🧺 Which of these is needed for the turmeric test? (a) water (b) a comb (c) a battery cell (d) a balloon
23. 23.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) vinegar
24. 24.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
25. 25.True or false: cold water to rinse is needed for making butter. (a) False (b) True
26. 26.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
27. 27.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is what we measure. (a) False (b) True
28. 28.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
29. 29.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) an empty bottle (d) sugar
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
31. 31.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed
32. 32.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) detergent water (d) sugar water
33. 33.🍋 Which of these steps is a job a child can do? (a) letting the paper dry (b) cutting the lemon (c) putting the iron away (d) ironing the paper
34. 34.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) with a hot glue gun (d) gently, not too tight
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they glow (c) they sprout faster (d) they do not sprout
37. 37.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) a magnet (c) yeast (d) a funnel
38. 38.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
39. 39.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) wash your hands (c) skip washing (d) lick your fingers
40. 40.True or false: yeast is not needed for making butter. (a) False (b) True

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