Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 539 · 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.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
2. 2.⚖️ 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
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) a mirror (d) a small bottle
4. 4.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) baking soda (d) small pebbles
5. 5.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a cotton bud (c) a mirror (d) a balloon
6. 6.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a comb (c) a magnet (d) a funnel or spoon
7. 7.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.True or false: wet seeds in the dark sprouts in a few days. (a) True (b) False
9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
10. 10.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) no, it stays brown (c) yes, if shaken (d) yes, if cooled
11. 11.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) dry yeast (d) a magnet
13. 13.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it can burn skin (c) it is sticky (d) it is cold
14. 14.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) eat a few to check (c) feed them to pets (d) throw them at friends
15. 15.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a tray for spills (c) a magnet (d) baking soda
16. 16.True or false: time is something yeast needs. (a) True (b) False
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
18. 18.📘 What do we call plants giving out water vapour from their leaves? (a) germination (b) transpiration (c) digestion (d) reflection
19. 19.🛟 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
20. 20.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they grow fruit (c) they glow (d) they do not sprout
21. 21.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) turmeric powder (d) a small bottle
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) warm water (c) a small bottle (d) dry yeast
24. 24.🔍 Which is the odd one out? (a) reading the message (b) writing the message (c) plugging in the iron (d) letting the paper dry
25. 25.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so cream does not spill (d) so air gets out
26. 26.🔍 Which is the odd one out? (a) baking a cake (b) folding paper (c) milk turning to curd (d) browning lemon ink
27. 27.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) sugar (d) glucose powder
28. 28.True or false: water is not needed for a seed to sprout. (a) False (b) True
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) False (b) True
30. 30.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts
31. 31.🫗 Is filtered pond water safe to drink? (a) yes, always (b) no, germs may stay (c) yes, if it is clear (d) yes, if it is cold
32. 32.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
33. 33.True or false: salt water is a base. (a) False (b) True
34. 34.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
35. 35.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
36. 36.🔮 Predict: you stop shaking after only one minute. What do you have? (a) still runny cream (b) ghee (c) cheese (d) butter lumps
37. 37.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
38. 38.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the kind of seeds (b) how many seeds sprout (c) the same place (d) the number of seeds
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed

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