Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 181 · 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.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) size of the balloon (b) the water temperature (c) the same bottles (d) the amount of yeast
3. 3.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it turns pink (c) it makes salt (d) it takes much longer
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.True or false: small stones from dal is done by winnowing. (a) True (b) False
7. 7.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
8. 8.🧺 Do we need cotton wool for sprouting seeds? (a) needed (b) not needed
9. 9.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) True (b) False
11. 11.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) nothing at all (c) it glows in the dark (d) lots of fizzy bubbles
12. 12.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) helium (c) carbon dioxide (d) hydrogen
13. 13.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a magnet (c) a bowl (d) a jar with a tight lid
14. 14.🌱 Why do the seeds on dry cotton not sprout? (a) they have no water (b) they are too wet (c) they have no salt (d) they have no soil
15. 15.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a battery cell (b) muddy water (c) sand and pebbles (d) a clean glass
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) False (b) True
17. 17.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the amount of vinegar (c) the kind of balloon (d) the same bottle
19. 19.🧺 Do we need a rubber band for the leafy bag test? (a) needed (b) not needed
20. 20.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) feed them to pets (c) throw them at friends (d) never put seeds in mouth
21. 21.True or false: make food in sunlight is a job of the roots. (a) False (b) True
22. 22.True or false: a tray for spills is not needed for the fizzy balloon. (a) False (b) True
23. 23.True or false: vinegar is an acid. (a) False (b) True
24. 24.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) baking soda (c) a comb (d) an empty bottle
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) False (b) True
26. 26.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) clearer (c) muddier (d) salty
27. 27.🪴 Which of these is a job of the stem? (a) make food in sunlight (b) take in water from soil (c) give out water vapour (d) carry water upward
28. 28.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) cotton wool (c) water (d) yeast
29. 29.True or false: turmeric powder is needed for the muddy water filter. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) writing the message (b) cutting the lemon (c) putting the iron away (d) plugging in the iron
31. 31.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
32. 32.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) yeast (c) a mirror (d) cotton wool
33. 33.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) the yeast is killed (d) it grows faster
34. 34.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) the same dish (c) sunny or shady place (d) the amount of water
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
38. 38.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🪴 Which of these is a job of the leaves? (a) take in water from soil (b) hold up the leaves (c) make seeds (d) give out water vapour

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