Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 17 · 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.🫗 How do we separate mud from water? (a) winnowing (b) sieving (c) handpicking (d) filtering
2. 2.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they react (c) they float apart (d) they become magnets
3. 3.🧺 Which of these is not needed for making butter? (a) turmeric powder (b) cold water to rinse (c) fresh cream (d) a timer
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
6. 6.True or false: a mirror is not needed for the muddy water filter. (a) True (b) False
7. 7.🧺 Do we need a mirror for the muddy water filter? (a) needed (b) not needed
8. 8.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it gets hot (c) so it turns yellow (d) so cream does not spill
9. 9.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
10. 10.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) yes, they sprout (c) no, never (d) they turn to stones
11. 11.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) carbon dioxide (c) oxygen (d) hydrogen
14. 14.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves stay behind (b) leaves pass through (c) both stay behind (d) tea stays behind
15. 15.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
18. 18.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) turmeric powder (c) a potted plant (d) sunlight
20. 20.True or false: vinegar keeps turmeric yellow. (a) False (b) True
21. 21.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is cold (c) it can burn skin (d) it is magnetic
22. 22.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rub it hard (c) ignore it (d) rinse with clean water
23. 23.🫗 Which of these is done by evaporating? (a) husk from rice grain (b) bad grains from rice (c) sugar from sugar water (d) bran from wheat flour
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
25. 25.🫧 Which of these is neutral? (a) lemon juice (b) baking soda water (c) soap solution (d) plain water
26. 26.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) the number of seeds (c) how many seeds sprout
27. 27.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) lick your fingers (d) wash hands afterwards
28. 28.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) salt (d) time
29. 29.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a magnet (b) cotton wool (c) moong seeds (d) a small bowl
30. 30.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) an ingredient ran out (c) the balloon got cold (d) the bottle got tired
31. 31.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
32. 32.🔍 Which is the odd one out? (a) freezing water (b) melting butter (c) milk turning to curd (d) melting ice
33. 33.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.⚖️ 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) size of the balloon (b) the water temperature (c) the amount of sugar (d) the amount of yeast
35. 35.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
36. 36.🌱 Seeds need water, air and ___ to sprout. (a) salt (b) soil (c) sugar (d) warmth
37. 37.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
38. 38.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.True or false: soap solution is neutral. (a) True (b) False
40. 40.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve

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