Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 822 · 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.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the salt (c) the mud (d) the water
2. 2.True or false: a comb is needed for the turmeric test. (a) True (b) False
3. 3.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
4. 4.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is hot (c) germs are invisible (d) clear water is salty
5. 5.True or false: warmth is not needed for a seed to sprout. (a) False (b) True
6. 6.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) never put seeds in mouth (c) throw them at friends (d) eat a few to check
7. 7.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) baking soda (c) a tray for spills (d) a seed
8. 8.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
9. 9.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing stays faint (c) writing turns green (d) the paper floats
10. 10.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) the amount of cream (c) time to make butter (d) how hard we shake
12. 12.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sugar (d) sunlight
13. 13.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they react (b) they become magnets (c) they freeze (d) they float apart
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) warm water (d) a mirror
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) turmeric powder (c) a cotton bud (d) a magnet
17. 17.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
18. 18.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a battery cell (c) an adult with an iron (d) a mirror
19. 19.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
20. 20.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a seed (c) a mirror (d) vinegar
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
22. 22.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a battery cell (c) lemon juice (d) white paper
23. 23.🔮 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
24. 24.🧈 Why does shaking cream make butter? (a) shaking adds salt (b) fat bits stick together (c) the lid is warm (d) the jar adds butter
25. 25.🫧 Which of these is neutral? (a) soap solution (b) sugar water (c) tamarind water (d) lemon juice
26. 26.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it can block breathing (d) it gets wet
27. 27.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
28. 28.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) the hot sunny day (c) both the same (d) the cool cloudy day
29. 29.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of salt (c) sunny or shady place (d) the same dish
31. 31.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar
32. 32.True or false: turmeric powder is needed for the muddy water filter. (a) True (b) False
33. 33.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) cotton or cloth (c) muddy water (d) a funnel
34. 34.True or false: a magnet is needed for the turmeric test. (a) True (b) False
35. 35.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it makes salt (b) it is much faster (c) it turns pink (d) it takes much longer
36. 36.True or false: baking soda does not dissolve in water. (a) False (b) True
37. 37.True or false: soap solution is an acid. (a) True (b) False
38. 38.True or false: warm water is something yeast does not need. (a) False (b) True
39. 39.True or false: a few days is not needed for sprouting seeds. (a) False (b) True
40. 40.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) skip washing

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