Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 630 · 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) dipping the cotton bud (b) writing the message (c) letting the paper dry (d) plugging in the iron
2. 2.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
4. 4.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a small bowl (c) a few days (d) a balloon
5. 5.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
6. 6.🌱 Is salt needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they float apart (b) they react (c) they freeze (d) they become magnets
9. 9.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it can block breathing (c) it changes colour (d) it gets wet
10. 10.True or false: dipping the cotton bud is a job for an adult. (a) False (b) True
11. 11.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) how dark the writing is (c) the same paper (d) the ironing time
14. 14.🔮 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
15. 15.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a mirror (c) a battery cell (d) a balloon
16. 16.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wipe hands on face (d) wash hands afterwards
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same muddy water (b) the filter material (c) the amount poured (d) how clear the water is
18. 18.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) never put seeds in mouth (c) throw them at friends (d) feed them to pets
19. 19.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
20. 20.🍋 Which of these steps is a job for an adult? (a) reading the message (b) letting the paper dry (c) dipping the cotton bud (d) plugging in the iron
21. 21.🫧 Which of these is neutral? (a) curd (b) plain water (c) soap solution (d) vinegar
22. 22.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a bowl (c) a balloon (d) cold water to rinse
23. 23.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) skip washing (c) wash your hands (d) lick your fingers
24. 24.True or false: a battery cell is needed for the fizzy balloon. (a) False (b) True
25. 25.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
26. 26.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
27. 27.True or false: air is needed for a seed to sprout. (a) False (b) True
28. 28.True or false: salt water is an acid. (a) True (b) False
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
31. 31.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
32. 32.True or false: a mirror is not needed for the fizzy balloon. (a) False (b) True
33. 33.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) folding paper (c) freezing water (d) melting ice
34. 34.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) soap solution (d) a balloon
35. 35.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it makes salt (c) it turns pink (d) it takes much longer
36. 36.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) True (b) False
37. 37.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) yes, all of it (c) no, salt passes through (d) it turns to sugar
38. 38.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) the balloon got cold (d) an ingredient ran out
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) True (b) False

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