Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 799 · 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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.⚖️ 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
3. 3.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
4. 4.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) the youngest child (c) whoever is fastest (d) any child
6. 6.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) it turns to sugar (c) no, salt passes through (d) yes, all of it
7. 7.True or false: make food in sunlight is a job of the leaves. (a) False (b) True
8. 8.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they react (b) they freeze (c) they float apart (d) they become magnets
9. 9.True or false: gravel from fine sand is done by sieving. (a) True (b) False
10. 10.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a magnet (c) a rubber band (d) a few hours
11. 11.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) yeast (c) a clear plastic bag (d) a magnet
12. 12.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
13. 13.True or false: water is needed for sprouting seeds. (a) False (b) True
14. 14.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) turmeric powder (c) white paper strips (d) water
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
17. 17.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the number of seeds (b) the same bowls (c) how many seeds sprout (d) the kind of seeds
18. 18.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) freezing water (d) melting butter
19. 19.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a comb (c) vinegar (d) a magnet
20. 20.🌱 Which of these is not needed for a seed to sprout? (a) salt (b) warmth (c) water (d) air
21. 21.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a magnet (c) cold water to rinse (d) a bowl
22. 22.True or false: lemon juice is an acid. (a) True (b) False
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) white paper (c) turmeric powder (d) an adult with an iron
24. 24.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
25. 25.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) a magnet (d) warm water
26. 26.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) food colour (d) small pebbles
27. 27.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is the one thing we change. (a) False (b) True
29. 29.True or false: warmth is not needed for a seed to sprout. (a) True (b) False
30. 30.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) a balloon (d) a comb
31. 31.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) salt water (c) detergent water (d) soap solution
32. 32.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) no, it stays brown (c) yes, in the dark (d) yes, if shaken
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) days to see crystals (c) sunny or shady place
35. 35.📘 What do we call plants giving out water vapour from their leaves? (a) transpiration (b) reflection (c) germination (d) digestion
36. 36.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a clean glass (c) sand and pebbles (d) a balloon
37. 37.True or false: writing the message is a job a child can do. (a) False (b) True
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the turmeric paper (c) the number of drops (d) the light we look in
39. 39.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) bubbles of gas (c) clear water only (d) lumps of butter

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