Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 396 · 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.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
2. 2.⚖️ 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 same bottles (b) size of the balloon (c) the water temperature (d) the amount of sugar
3. 3.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
5. 5.🎈 Why does the balloon blow up? (a) gas is made inside (b) vinegar is hot (c) the bottle shrinks (d) outside air gets in
6. 6.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, if shaken (c) no, it stays brown (d) yes, in the dark
7. 7.🧺 Which of these is needed for making butter? (a) a mirror (b) a balloon (c) turmeric powder (d) a timer
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🫧 Which of these is a base? (a) lemon juice (b) orange juice (c) baking soda water (d) sugar water
10. 10.⚖️ 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
11. 11.True or false: a few days is needed for sprouting seeds. (a) False (b) True
12. 12.🌱 Where does a sprouting seed get its first food from? (a) the cotton wool (b) food stored in the seed (c) the sunlight only (d) the air
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
16. 16.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the paper ate it (c) dry juice is see-through (d) the ink is magnetic
17. 17.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
18. 18.🔍 Which is the odd one out? (a) plugging in the iron (b) reading the message (c) ironing the paper (d) putting the iron away
19. 19.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a magnet (c) a battery cell (d) vinegar
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) warm water (d) a piece of string
21. 21.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) turmeric powder (c) a small bowl (d) a battery cell
22. 22.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) muddier (c) hot (d) salty
23. 23.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a clean glass (c) cotton or cloth (d) a magnet
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
25. 25.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🫧 Which of these is neutral? (a) orange juice (b) tamarind water (c) plain water (d) vinegar
28. 28.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
29. 29.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
30. 30.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) a dropper or spoon (d) a comb
31. 31.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) small pebbles (d) baking soda
32. 32.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
33. 33.🌱 Which of these is needed for a seed to sprout? (a) water (b) sunlight (c) salt (d) sugar
34. 34.True or false: lemon juice is an acid. (a) True (b) False
35. 35.True or false: salt water keeps turmeric yellow. (a) False (b) True
36. 36.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
37. 37.🧺 Which of these is needed for the fizzy balloon? (a) a balloon (b) a seed (c) a comb (d) a battery cell
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True
39. 39.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they react (b) they freeze (c) they float apart (d) they become magnets
40. 40.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed

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