Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 93 · 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 did the water inside the bag come from? (a) the plastic (b) the leaves (c) the rain (d) the rubber band
2. 2.True or false: food colour does not dissolve in water. (a) False (b) True
3. 3.True or false: food colour dissolves in water. (a) False (b) True
4. 4.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no soil (c) they have no water (d) they are too wet
5. 5.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) a huge eruption (c) very little fizzing (d) it turns to honey
6. 6.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
7. 7.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) True (b) False
8. 8.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the water evaporates (d) the filter traps mud
9. 9.🧂 Which of these does not dissolve in water? (a) sawdust (b) glucose powder (c) table salt (d) sugar
10. 10.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
11. 11.True or false: salt water is an acid. (a) True (b) False
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
13. 13.True or false: salt water is a base. (a) False (b) True
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) how dark the writing is (b) the ironing time (c) the same cotton bud (d) the kind of juice
15. 15.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) dark brown words (d) almost nothing
16. 16.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
17. 17.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
19. 19.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the juice scorches first (c) heat adds colour (d) the iron is brown
20. 20.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
21. 21.🫗 Which of these is done by winnowing? (a) small stones from dal (b) bad grains from rice (c) gravel from fine sand (d) husk from rice grain
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) a tray for spills (c) vinegar (d) a balloon
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
25. 25.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
26. 26.True or false: vinegar is needed for the fizzy balloon. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) tamarind water (b) salt water (c) sugar water (d) plain water
28. 28.🧺 Do we need a balloon for making butter? (a) not needed (b) needed
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) lemon juice (c) water (d) turmeric powder
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) False (b) True
32. 32.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
33. 33.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
34. 34.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
35. 35.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with a hot glue gun (c) with sharp wire (d) gently, not too tight
36. 36.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a funnel or spoon (c) a comb (d) a magnet
37. 37.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) lemon juice (c) a balloon (d) white paper
38. 38.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
39. 39.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.True or false: yeast is needed for the leafy bag test. (a) True (b) False

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