Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 32 · 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.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
2. 2.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
3. 3.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) lemon juice (c) white paper (d) a balloon
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) dry yeast (d) a small bottle
5. 5.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) a funnel or spoon (c) vinegar (d) an empty bottle
6. 6.⚖️ 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 measure it (c) we change it
7. 7.🫧 Which of these is a base? (a) vinegar (b) tamarind water (c) salt water (d) detergent water
8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
9. 9.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) stomata (c) roots (d) petals
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the light we look in (d) the colour we see
11. 11.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) it is only dissolving (c) yes, a new gas forms (d) no, nothing changes
12. 12.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
13. 13.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a battery cell (c) muddy water (d) a funnel
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
19. 19.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) muddy water (c) a mirror (d) yeast
20. 20.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) melting butter (d) rusting iron
21. 21.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) a rubber band (c) a battery cell (d) a potted plant
22. 22.🔍 Which is the odd one out? (a) cooking an egg (b) freezing water (c) baking a cake (d) rusting iron
23. 23.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.True or false: water is not needed for sprouting seeds. (a) False (b) True
25. 25.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) white (c) green (d) blue
26. 26.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a magnet (d) a shallow dish
27. 27.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) sun or shade (b) the same kind of bag (c) the size of the plant (d) amount of water drops
28. 28.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) True (b) False
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.🔍 Which is the odd one out? (a) salt water (b) plain water (c) soap solution (d) sugar water
33. 33.🫧 Which of these is a base? (a) curd (b) tamarind water (c) vinegar (d) soap solution
34. 34.🫧 Which of these is neutral? (a) vinegar (b) plain water (c) curd (d) baking soda water
35. 35.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
36. 36.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a magnet (c) a rubber band (d) sunlight
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is kept the same. (a) True (b) False
38. 38.⚖️ 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
39. 39.🧺 Do we need a balloon for the muddy water filter? (a) needed (b) not needed
40. 40.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone

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