Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 3 · 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.🧺 Do we need a balloon for making butter? (a) not needed (b) needed
2. 2.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
3. 3.True or false: sugar is needed for a seed to sprout. (a) True (b) False
4. 4.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) white at once (d) green
5. 5.⚖️ 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) days to see crystals (b) the kind of salt (c) sunny or shady place (d) the amount of salt
6. 6.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
7. 7.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the turmeric paper
9. 9.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
10. 10.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
11. 11.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
12. 12.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns blue (b) it turns to cheese (c) more butter forms (d) no butter forms
13. 13.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
14. 14.True or false: warm water is something yeast does not need. (a) True (b) False
15. 15.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the ink is magnetic (c) it turned into air (d) the paper ate it
17. 17.True or false: a mirror is needed for the leafy bag test. (a) True (b) False
18. 18.🧺 Do we need a balloon for the secret lemon message? (a) needed (b) not needed
19. 19.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
20. 20.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a magnet (c) a bowl (d) cold water to rinse
23. 23.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
24. 24.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
25. 25.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
26. 26.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) warm water (d) a shallow dish
28. 28.🧺 Do we need a jar with a tight lid for making butter? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a battery cell (c) turmeric powder (d) a cotton bud
30. 30.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a rubber band (c) a clear plastic bag (d) a battery cell
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the time we wait
32. 32.True or false: sawdust does not dissolve in water. (a) False (b) True
33. 33.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) folding paper (d) cooking an egg
34. 34.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
35. 35.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) False (b) True
36. 36.True or false: salt is something yeast needs. (a) True (b) False
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a mirror (d) sugar
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the water temperature (c) the amount of yeast (d) the same bottles
39. 39.🫧 Which of these is a base? (a) detergent water (b) curd (c) sugar water (d) orange juice
40. 40.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) a balloon (c) muddy water (d) turmeric powder

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