Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 879 · 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.🔍 Which is the odd one out? (a) baking a cake (b) rusting iron (c) cooking an egg (d) dissolving salt
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the ironing time (b) the kind of juice (c) how dark the writing is
4. 4.🫗 Which of these is done by handpicking? (a) bad grains from rice (b) bran from wheat flour (c) mud from water (d) chaff from wheat grain
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a balloon (c) a battery cell (d) a magnet
7. 7.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) the amount of cream (c) time to make butter
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) True (b) False
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.True or false: melting ice is a change that can be undone. (a) True (b) False
12. 12.True or false: take in water from soil is a job of the stem. (a) False (b) True
13. 13.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is what we measure. (a) False (b) True
14. 14.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
15. 15.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
16. 16.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
18. 18.True or false: a battery cell is needed for the fizzy balloon. (a) False (b) True
19. 19.True or false: melting ice is a change that cannot be undone. (a) False (b) True
20. 20.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.True or false: cold water to rinse is needed for making butter. (a) True (b) False
22. 22.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a cotton bud (c) an adult with an iron (d) a mirror
24. 24.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) butter lumps (c) cheese (d) still runny cream
25. 25.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) ironing the paper (c) putting the iron away (d) reading the message
26. 26.🌱 Is sunlight needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
27. 27.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a mirror (c) a comb (d) vinegar
28. 28.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a few hours (c) a magnet (d) sunlight
29. 29.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) muddy water (c) a mirror (d) cotton or cloth
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
31. 31.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
32. 32.True or false: freezing water is a change that can be undone. (a) True (b) False
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a piece of string (c) warm water (d) a spoon
34. 34.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) salt crystals (c) nothing at all (d) tiny water drops
35. 35.⚖️ 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 kind of juice (c) how dark the writing is (d) the ironing time
36. 36.🔍 Which is the odd one out? (a) food colour (b) table salt (c) cooking oil (d) sugar
37. 37.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) cooking oil (d) sugar
38. 38.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) turmeric powder (b) muddy water (c) a clean glass (d) sand and pebbles
39. 39.🧂 Which of these dissolves in water? (a) sand (b) baking soda (c) cooking oil (d) chalk powder
40. 40.🫧 Which of these is an acid? (a) detergent water (b) soap solution (c) vinegar (d) sugar water

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