Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 860 · 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 is the odd one out? (a) sand (b) cooking oil (c) sawdust (d) table salt
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we change it (b) we keep it the same (c) we measure it
3. 3.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
4. 4.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) water (c) cotton wool (d) yeast
5. 5.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
6. 6.🌱 Which of these is not needed for a seed to sprout? (a) air (b) water (c) warmth (d) soil
7. 7.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the plastic (c) the leaves (d) the rain
8. 8.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) a balloon (c) a timer (d) cold water to rinse
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) True (b) False
10. 10.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) hydrogen (c) carbon dioxide (d) helium
11. 11.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
12. 12.🧺 Which of these is needed for making butter? (a) yeast (b) turmeric powder (c) a mirror (d) a bowl
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) it is only melting (c) yes, a new gas forms (d) it is only dissolving
16. 16.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) chalk powder (d) food colour
17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) water (c) soap solution (d) turmeric powder
18. 18.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the salt (c) the water (d) the mud
19. 19.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) freezing water (d) melting ice
20. 20.🌱 Seeds need water, air and ___ to sprout. (a) soil (b) warmth (c) sugar (d) salt
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a balloon (d) a spoon
22. 22.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the balloon got cold (c) the gas froze (d) the bottle got tired
23. 23.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) writing the message (c) reading the message (d) letting the paper dry
24. 24.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) the cream temperature (c) how hard we shake (d) time to make butter
26. 26.True or false: yeast is needed for the muddy water filter. (a) False (b) True
27. 27.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
28. 28.True or false: yeast is needed for the secret lemon message. (a) True (b) False
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.True or false: melting butter is a change that can be undone. (a) True (b) False
31. 31.True or false: a cotton bud is not needed for the secret lemon message. (a) False (b) True
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a shallow dish (d) turmeric powder
33. 33.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) vinegar (c) baking soda (d) a magnet
35. 35.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
36. 36.🔍 Which is the odd one out? (a) putting the iron away (b) plugging in the iron (c) cutting the lemon (d) writing the message
37. 37.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) more butter forms (c) no butter forms (d) it turns blue
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) sunny or shady place (b) the amount of salt (c) the same dish (d) the amount of water
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) turmeric powder (d) salt
40. 40.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) it grows bigger (d) there is no change

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