Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 127 · 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 rain (b) the leaves (c) the rubber band (d) the plastic
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we keep it the same (c) we measure it
3. 3.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) lick your fingers (c) skip washing (d) rub your eyes
4. 4.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
5. 5.🫗 Which of these is done by handpicking? (a) husk from rice grain (b) small stones from dal (c) chaff from wheat grain (d) tea leaves from tea
6. 6.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) it turns to honey (c) a huge eruption (d) very little fizzing
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) much more water (d) it fills with soil
9. 9.🍋 Which of these steps is a job for an adult? (a) reading the message (b) dipping the cotton bud (c) plugging in the iron (d) writing the message
10. 10.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
11. 11.🫗 How do we separate tea leaves from tea? (a) winnowing (b) handpicking (c) sieving (d) filtering
12. 12.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
13. 13.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) carry water upward (c) take in water from soil (d) give out water vapour
14. 14.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) cutting the lemon (d) writing the message
16. 16.True or false: a balloon is needed for the secret lemon message. (a) False (b) True
17. 17.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) dark brown words (c) blue words (d) almost nothing
18. 18.True or false: a balloon is needed for the muddy water filter. (a) True (b) False
19. 19.🪴 Which of these is a job of the flower? (a) hold up the leaves (b) make food in sunlight (c) take in water from soil (d) make seeds
20. 20.🫧 Which of these is an acid? (a) soap solution (b) tamarind water (c) salt water (d) detergent water
21. 21.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
22. 22.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no soil (c) they have no water (d) they have no salt
23. 23.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) salt (c) a balloon (d) a magnet
26. 26.🧺 Do we need a battery cell for the fizzy balloon? (a) needed (b) not needed
27. 27.True or false: yeast is not needed for the leafy bag test. (a) True (b) False
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) it turns blue (c) it turns to cheese (d) no butter forms
30. 30.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is cold (c) it can burn skin (d) it is magnetic
31. 31.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) with a hot glue gun (d) gently, not too tight
32. 32.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
36. 36.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) hot (c) salty (d) muddier
37. 37.True or false: writing the message is a job for an adult. (a) False (b) True
38. 38.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a comb (c) a funnel or spoon (d) baking soda
39. 39.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
40. 40.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout

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