Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 297 · 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.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
2. 2.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
3. 3.🫗 How do we separate mud from water? (a) winnowing (b) handpicking (c) sieving (d) filtering
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) how clear the water is (c) the amount poured (d) the filter material
5. 5.True or false: baking soda dissolves in water. (a) True (b) False
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.True or false: turmeric powder is not needed for the secret lemon message. (a) True (b) False
10. 10.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) sugar (d) sand
11. 11.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.True or false: a funnel or spoon is needed for the fizzy balloon. (a) False (b) True
13. 13.True or false: a battery cell is not needed for making butter. (a) False (b) True
14. 14.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) vinegar (d) sugar
15. 15.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the plastic (c) the rain (d) the leaves
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is kept the same. (a) True (b) False
17. 17.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
19. 19.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it flowers more (c) it turns blue (d) it wilts and droops
20. 20.True or false: give out water vapour is a job of the roots. (a) False (b) True
21. 21.True or false: tamarind water is neutral. (a) False (b) True
22. 22.⚖️ 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 change it (b) we keep it the same (c) we measure it
23. 23.⚖️ 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 the one thing we change. (a) True (b) False
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.True or false: seeds on dry cotton sprouts in a few days. (a) False (b) True
26. 26.True or false: water is needed for the turmeric test. (a) False (b) True
27. 27.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if cooled (c) yes, if shaken (d) no, it stays brown
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
29. 29.True or false: salt water is a base. (a) False (b) True
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
31. 31.🧈 Before the butter appears, what does the cream turn into? (a) powder (b) clear water (c) ice (d) thick whipped cream
32. 32.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) vinegar (c) an empty bottle (d) a tray for spills
33. 33.🌱 Which of these does not sprout? (a) seeds on dry cotton (b) seeds on wet cotton (c) wet seeds by a window (d) wet seeds in the dark
34. 34.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
36. 36.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
37. 37.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) freezing water (d) baking a cake
39. 39.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) plain water (d) lemon juice
40. 40.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base

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