Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 708 · 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.🧺 Which of these is not needed for the secret lemon message? (a) a mirror (b) white paper (c) an adult with an iron (d) a small bowl
2. 2.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
3. 3.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
4. 4.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the paper ate it (c) it turned into air (d) the ink is magnetic
5. 5.🔍 Which is the odd one out? (a) baking a cake (b) melting ice (c) dissolving salt (d) folding paper
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they float apart (b) they become magnets (c) they freeze (d) they react
8. 8.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) it glows in the dark (c) lots of fizzy bubbles (d) it turns to ice
9. 9.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) yes, a new gas forms (c) it is only melting (d) it is only dissolving
10. 10.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) sand and pebbles (c) a clean glass (d) a balloon
13. 13.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
14. 14.True or false: muddy water is needed for the muddy water filter. (a) False (b) True
15. 15.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) sunlight (c) a clear plastic bag (d) yeast
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) an empty bottle (c) a tray for spills (d) a magnet
17. 17.True or false: warmth is needed for a seed to sprout. (a) False (b) True
18. 18.🪴 Which of these is a job of the leaves? (a) give out water vapour (b) hold up the leaves (c) take in water from soil (d) make seeds
19. 19.🔍 Which is the odd one out? (a) soil (b) salt (c) warmth (d) sugar
20. 20.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so cream does not spill (d) so air gets out
21. 21.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) sugar (d) time
22. 22.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
23. 23.True or false: soil is needed for a seed to sprout. (a) False (b) True
24. 24.🧺 Do we need a small bowl for the secret lemon message? (a) not needed (b) needed
25. 25.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a mirror (d) warm water
27. 27.True or false: orange juice is neutral. (a) False (b) True
28. 28.True or false: wet seeds in the dark sprouts in a few days. (a) False (b) True
29. 29.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
30. 30.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
31. 31.True or false: lemon juice is neutral. (a) False (b) True
32. 32.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
33. 33.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
36. 36.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
37. 37.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: reading the message is a job for an adult. (a) False (b) True
39. 39.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wipe hands on face (c) nothing is needed (d) wash hands afterwards
40. 40.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed

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