Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 899 · 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.🔍 What do you see after shaking cream in a jar for a long time? (a) lumps of butter (b) bubbles of gas (c) clear water only (d) sugar crystals
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) tamarind water (c) salt water (d) plain water
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns blue (b) it turns to cheese (c) more butter forms (d) no butter forms
5. 5.True or false: a balloon is not needed for the fizzy balloon. (a) False (b) True
6. 6.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
7. 7.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it grows faster (d) it wilts and droops
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the amount poured (c) the filter material (d) how clear the water is
9. 9.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) shake it near your face (c) keep it away from eyes (d) seal it in a glass jar
10. 10.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) tiny insects (c) salt crystals (d) nothing at all
11. 11.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) sunlight (d) salt
12. 12.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) False (b) True
13. 13.🌱 Which of these is needed for a seed to sprout? (a) salt (b) sunlight (c) air (d) soil
14. 14.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) there is no change (c) it grows bigger (d) it shrinks
15. 15.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
16. 16.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
18. 18.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) dry juice is see-through (c) the ink is magnetic (d) the paper ate it
19. 19.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) white paper (c) a cotton bud (d) a balloon
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
21. 21.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
22. 22.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
23. 23.⚖️ 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
24. 24.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the gas froze (c) an ingredient ran out (d) the bottle got tired
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a mirror (c) dry yeast (d) warm water
26. 26.True or false: a clear plastic bag is needed for the leafy bag test. (a) True (b) False
27. 27.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) blue (c) brown (d) white
28. 28.🧈 Why does shaking cream make butter? (a) fat bits stick together (b) the lid is warm (c) shaking adds salt (d) the jar adds butter
29. 29.🌱 Is sugar needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) the same jar
31. 31.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) cutting the lemon (c) letting the paper dry (d) ironing the paper
32. 32.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) white paper (c) a small bowl (d) an adult with an iron
33. 33.True or false: an empty bottle is not needed for the fizzy balloon. (a) False (b) True
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is what we measure. (a) False (b) True
35. 35.🫗 Which of these is done by handpicking? (a) mud from water (b) tea leaves from tea (c) sugar from sugar water (d) small stones from dal
36. 36.⚖️ 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
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.🧺 Which of these is needed for making butter? (a) yeast (b) a mirror (c) a bowl (d) a balloon
40. 40.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) lemon juice (c) turmeric powder (d) white paper strips

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