Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 474 · 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.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) no, nothing changes (c) it is only melting (d) yes, a new gas forms
2. 2.🌱 Will these sprout: seeds in the freezer? (a) sprouts (b) does not sprout
3. 3.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) the amount of vinegar (c) spoons of baking soda (d) size of the balloon
5. 5.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
6. 6.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
7. 7.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
8. 8.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
9. 9.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
10. 10.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
13. 13.🧺 Which of these is not needed for the muddy water filter? (a) a clean glass (b) muddy water (c) a battery cell (d) cotton or cloth
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
15. 15.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a mirror (c) sunlight (d) a magnet
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
17. 17.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) ghee (c) cheese (d) still runny cream
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) False (b) True
19. 19.🫗 Which of these is done by evaporating? (a) bad grains from rice (b) bran from wheat flour (c) sugar from sugar water (d) small stones from dal
20. 20.🍋 Which of these steps is a job a child can do? (a) dipping the cotton bud (b) plugging in the iron (c) putting the iron away (d) ironing the paper
21. 21.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, if it is cold (c) no, germs may stay (d) yes, always
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) tamarind water (d) baking soda water
23. 23.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
25. 25.True or false: turmeric powder is not needed for making butter. (a) False (b) True
26. 26.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) nothing is needed (d) wash hands afterwards
27. 27.True or false: an empty bottle is not needed for the fizzy balloon. (a) False (b) True
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is what we measure. (a) True (b) False
29. 29.True or false: curd is neutral. (a) True (b) False
30. 30.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
31. 31.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) folding paper (c) melting butter (d) dissolving salt
32. 32.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
33. 33.🧺 Which of these is needed for the secret lemon message? (a) a cotton bud (b) a balloon (c) a magnet (d) turmeric powder
34. 34.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a battery cell (c) a timer (d) a jar with a tight lid
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the liquid we test (c) the colour we see (d) the turmeric paper
36. 36.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so cream does not spill (c) so it gets hot (d) so it turns yellow
37. 37.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
39. 39.🍋 Which of these steps is a job for an adult? (a) reading the message (b) cutting the lemon (c) letting the paper dry (d) writing the message
40. 40.🧺 Which of these is not needed for sprouting seeds? (a) water (b) moong seeds (c) a small bowl (d) a balloon

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