Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 296 · 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.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
2. 2.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) yes, all of it (c) it turns to sugar (d) it turns to sand
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.True or false: a battery cell is not needed for making butter. (a) True (b) False
6. 6.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a magnet (c) a funnel or spoon (d) baking soda
7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is kept the same. (a) True (b) False
10. 10.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
12. 12.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) musical (c) chemical (d) magnetic
13. 13.⚖️ 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 kept the same. (a) True (b) False
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) a dropper or spoon (d) yeast
16. 16.True or false: a balloon is needed for making butter. (a) True (b) False
17. 17.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
18. 18.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they have no water (c) they have no salt (d) they are too wet
19. 19.🫗 Which of these is done by sieving? (a) salt from sea water (b) mud from water (c) bran from wheat flour (d) tea leaves from tea
20. 20.🔍 Which is the odd one out? (a) letting the paper dry (b) reading the message (c) putting the iron away (d) dipping the cotton bud
21. 21.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) gently, not too tight (c) as tight as possible (d) with a hot glue gun
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
26. 26.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) green (c) brown (d) blue
27. 27.True or false: a cotton bud is not needed for the secret lemon message. (a) False (b) True
28. 28.🧺 Which of these is needed for making butter? (a) a timer (b) a balloon (c) a magnet (d) a mirror
29. 29.🧺 Which of these is not needed for making butter? (a) a timer (b) cold water to rinse (c) a bowl (d) a magnet
30. 30.True or false: carry water upward is a job of the stem. (a) False (b) True
31. 31.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it flowers more (c) it wilts and droops (d) it turns blue
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) the ironing time (c) how dark the writing is (d) the same paper
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a comb (d) turmeric powder
34. 34.🫗 How do we separate small stones from dal? (a) winnowing (b) handpicking (c) evaporating (d) filtering
35. 35.True or false: bran from wheat flour is done by sieving. (a) True (b) False
36. 36.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) salt (d) a magnet
37. 37.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) warmth (b) salt (c) air (d) water
40. 40.True or false: ironing the paper is a job for an adult. (a) False (b) True

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