Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 520 · 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.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.🔍 Which is the odd one out? (a) cooking an egg (b) browning lemon ink (c) freezing water (d) baking a cake
4. 4.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a mirror (d) salt
6. 6.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) False (b) True
7. 7.🪴 Which of these is a job of the flower? (a) hold up the leaves (b) make seeds (c) take in water from soil (d) carry water upward
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) muddy water (c) a funnel (d) a magnet
10. 10.True or false: a comb is needed for the fizzy balloon. (a) False (b) True
11. 11.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) sand (d) sugar
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
13. 13.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) letting the paper dry (c) cutting the lemon (d) putting the iron away
14. 14.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) vinegar (d) lemon juice
15. 15.🧺 Which of these is needed for sprouting seeds? (a) a small bowl (b) a magnet (c) a balloon (d) a mirror
16. 16.🔍 Which is the odd one out? (a) putting the iron away (b) reading the message (c) plugging in the iron (d) cutting the lemon
17. 17.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a balloon (c) a magnet (d) an empty bottle
18. 18.🫧 What do you see when baking soda meets vinegar? (a) lots of fizzy bubbles (b) it glows in the dark (c) it turns to ice (d) nothing at all
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is the one thing we change. (a) True (b) False
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) the same cotton bud (c) the same paper (d) the kind of juice
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a spoon (c) warm water (d) salt
23. 23.🔍 Which is the odd one out? (a) salt water (b) tamarind water (c) detergent water (d) vinegar
24. 24.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
26. 26.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a jar with a tight lid (c) a timer (d) a mirror
29. 29.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
30. 30.🍋 Which of these steps is a job for an adult? (a) putting the iron away (b) writing the message (c) letting the paper dry (d) dipping the cotton bud
31. 31.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it disappears (d) it turns blue
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the time we wait (b) the same kind of bag (c) sun or shade (d) the size of the plant
33. 33.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
34. 34.🧈 Which of these is a change that can be undone? (a) folding paper (b) rusting iron (c) baking a cake (d) browning lemon ink
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.True or false: letting the paper dry is a job for an adult. (a) True (b) False
37. 37.True or false: curd is a base. (a) False (b) True
38. 38.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if shaken (c) no, it stays brown (d) yes, if cooled
39. 39.True or false: make seeds is a job of the stem. (a) True (b) False
40. 40.🌱 Which of these is not needed for a seed to sprout? (a) soil (b) water (c) warmth (d) air

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