Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 534 · 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.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) white (c) green (d) brown
2. 2.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
3. 3.🧺 Do we need a magnet for the leafy bag test? (a) not needed (b) needed
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
5. 5.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a shallow dish (d) a piece of string
7. 7.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
8. 8.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
9. 9.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) small pebbles (d) food colour
10. 10.True or false: a balloon is needed for the muddy water filter. (a) True (b) False
11. 11.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes
12. 12.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts
13. 13.True or false: time is something yeast needs. (a) True (b) False
14. 14.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) the hot sunny day (c) both the same (d) neither of them
15. 15.🌱 Which of these is needed for a seed to sprout? (a) salt (b) air (c) sunlight (d) sugar
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) turmeric powder (d) a small bottle
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) a mirror (d) lemon juice
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) vinegar (c) an empty bottle (d) a seed
20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) a dropper or spoon (d) lemon juice
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
23. 23.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) lumps of butter (c) bubbles of gas (d) sugar crystals
24. 24.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a clean glass (c) a funnel (d) turmeric powder
25. 25.⚖️ 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) the amount of salt (b) the amount of water (c) the same dish (d) sunny or shady place
26. 26.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
27. 27.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
28. 28.🫗 Which of these is done by filtering? (a) chaff from wheat grain (b) husk from rice grain (c) tea leaves from tea (d) gravel from fine sand
29. 29.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a magnet (c) yeast (d) an adult with an iron
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
31. 31.True or false: a mirror is needed for sprouting seeds. (a) True (b) False
32. 32.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, in the dark (c) yes, if cooled (d) no, it stays brown
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
34. 34.🌱 Which of these is not needed for a seed to sprout? (a) air (b) soil (c) water (d) warmth
35. 35.True or false: baking soda water is an acid. (a) False (b) True
36. 36.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
37. 37.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) the paper floats (c) writing stays faint (d) it gets darker
40. 40.True or false: water is not needed for the turmeric test. (a) True (b) False

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