Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 522 · 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 — 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 same dish (c) sunny or shady place (d) the amount of water
2. 2.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🍞 Which of these is something yeast does not need? (a) a magnet (b) sugar (c) time (d) warm water
5. 5.True or false: vinegar is needed for the fizzy balloon. (a) False (b) True
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.True or false: sawdust does not dissolve in water. (a) False (b) True
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) False (b) True
9. 9.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) it fills with soil (c) exactly the same (d) much more water
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the same paper (c) the same cotton bud (d) how dark the writing is
11. 11.🍋 Which of these steps is a job for an adult? (a) plugging in the iron (b) dipping the cotton bud (c) reading the message (d) letting the paper dry
12. 12.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) it turns to honey (c) a huge eruption (d) the balloon bursts
13. 13.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) salt water (c) soap solution (d) lemon juice
14. 14.True or false: lemon juice is an acid. (a) True (b) False
15. 15.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
16. 16.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a mirror (c) white paper strips (d) lemon juice
18. 18.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a mirror (c) sunlight (d) a potted plant
19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
21. 21.🫧 Which of these is an acid? (a) sugar water (b) orange juice (c) soap solution (d) plain water
22. 22.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
23. 23.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
24. 24.🔍 What do you see after shaking cream in a jar for a long time? (a) lumps of butter (b) bubbles of gas (c) sugar crystals (d) clear water only
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) salt water (d) soap solution
27. 27.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a mirror (c) cotton wool (d) water
28. 28.🔍 Which is the odd one out? (a) milk turning to curd (b) freezing water (c) browning lemon ink (d) cooking an egg
29. 29.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) dry juice is see-through (c) the paper ate it (d) the ink is magnetic
30. 30.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
31. 31.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the time we wait
33. 33.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
34. 34.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
35. 35.True or false: melting ice is a change that can be undone. (a) False (b) True
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) muddy water (c) sand and pebbles (d) turmeric powder
37. 37.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
38. 38.True or false: sugar from sugar water is done by evaporating. (a) False (b) True
39. 39.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) cold water to rinse (c) a balloon (d) a timer
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True

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