Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 649 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) yeast (d) salt
2. 2.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is sticky (c) it can burn skin (d) it is magnetic
3. 3.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) yeast (c) a small bowl (d) a mirror
4. 4.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) an ingredient ran out (c) the gas froze (d) the bottle got tired
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) True (b) False
6. 6.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
7. 7.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) vinegar (b) a few hours (c) sunlight (d) a rubber band
8. 8.True or false: sugar water is neutral. (a) True (b) False
9. 9.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) False (b) True
10. 10.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) how many seeds sprout (b) the number of seeds (c) the same bowls (d) the same place
11. 11.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
12. 12.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) baking soda water (d) soap solution
13. 13.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) as tight as possible (d) gently, not too tight
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the iron setting (b) how dark the writing is (c) the kind of juice
15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) put it in your mouth (d) keep it for a month
16. 16.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) time (d) sugar
17. 17.True or false: baking soda water is neutral. (a) False (b) True
18. 18.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is hot (c) clear water is salty (d) clear water is sweet
19. 19.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
20. 20.🧺 Which of these is needed for making butter? (a) a magnet (b) a balloon (c) fresh cream (d) turmeric powder
21. 21.🔍 Which is the odd one out? (a) salt (b) sunlight (c) vinegar (d) warm water
22. 22.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
23. 23.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a potted plant (c) a few hours (d) a mirror
24. 24.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a cotton bud (c) turmeric powder (d) lemon juice
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) a piece of string (d) yeast
26. 26.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) time (d) warm water
27. 27.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a funnel or spoon (c) a seed (d) a tray for spills
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.True or false: detergent water is a base. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) orange juice (b) lemon juice (c) salt water (d) curd
32. 32.🌱 Is sunlight needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) sugar (d) table salt
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) rub your eyes (c) skip washing (d) wash your hands
39. 39.True or false: a funnel or spoon is not needed for the fizzy balloon. (a) True (b) False
40. 40.True or false: a balloon is needed for the muddy water filter. (a) False (b) True

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