Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 674 · 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) lemon juice (b) detergent water (c) vinegar (d) salt water
2. 2.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
3. 3.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
4. 4.True or false: a battery cell is not needed for the muddy water filter. (a) False (b) True
5. 5.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) lick your fingers (d) nothing is needed
6. 6.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) a jar with a tight lid (d) a mirror
7. 7.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) vinegar
8. 8.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
9. 9.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
10. 10.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
11. 11.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) True (b) False
13. 13.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) shaking adds salt (c) the lid is warm (d) fat bits stick together
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
15. 15.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
16. 16.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
17. 17.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) skip washing
18. 18.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
19. 19.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
20. 20.True or false: plain water is neutral. (a) False (b) True
21. 21.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it changes colour (c) it is too big (d) it gets wet
22. 22.🧺 Do we need yeast for sprouting seeds? (a) not needed (b) needed
23. 23.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) wet or dry cotton (c) the same place
24. 24.🔍 Which is the odd one out? (a) melting butter (b) rusting iron (c) dissolving salt (d) folding paper
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) vinegar (c) a balloon (d) a magnet
27. 27.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a battery cell (c) a clear plastic bag (d) sunlight
29. 29.True or false: boiled seeds sprouts in a few days. (a) True (b) False
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the amount of vinegar (c) size of the balloon
31. 31.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
32. 32.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
33. 33.🔍 Which is the odd one out? (a) cutting the lemon (b) writing the message (c) ironing the paper (d) putting the iron away
34. 34.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
35. 35.🔍 Which is the odd one out? (a) plain water (b) orange juice (c) salt water (d) sugar water
36. 36.True or false: a mirror is not needed for the fizzy balloon. (a) True (b) False
37. 37.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) muddier (c) salty (d) hot
38. 38.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
39. 39.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
40. 40.True or false: turmeric powder is needed for the leafy bag test. (a) True (b) False

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