Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 814 · 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 of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) baking a cake (d) folding paper
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) with a hot glue gun (d) gently, not too tight
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of sugar (c) the amount of water (d) the same bottles
6. 6.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) never put seeds in mouth (d) eat a few to check
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) warm water (d) a battery cell
8. 8.True or false: tamarind water is an acid. (a) True (b) False
9. 9.True or false: white paper is not needed for the secret lemon message. (a) False (b) True
10. 10.True or false: sunlight is needed for the leafy bag test. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) plain water (d) detergent water
12. 12.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
13. 13.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is hotter (c) it is heavier (d) it is magnetic
14. 14.🧈 What is the watery liquid left after the butter forms? (a) buttermilk (b) honey (c) vinegar (d) oil
15. 15.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) lemon juice (c) soap solution (d) white paper strips
16. 16.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
17. 17.⚖️ 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 water
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the number of drops
19. 19.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) petals (b) roots (c) veins (d) stomata
20. 20.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) plain water (d) sugar water
21. 21.🧺 Do we need a magnet for making butter? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a magnet (c) a battery cell (d) a mirror
23. 23.🫗 How do we separate bad grains from rice? (a) handpicking (b) winnowing (c) sieving (d) filtering
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.True or false: melting butter is a change that cannot be undone. (a) True (b) False
26. 26.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wipe hands on face (c) wash hands afterwards (d) nothing is needed
27. 27.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) your best clothes (d) an old shirt or apron
29. 29.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) a mirror (c) a few days (d) a small bowl
30. 30.🪴 Which part of a plant does this job: make seeds? (a) stem (b) roots (c) leaves (d) flower
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
32. 32.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a magnet (c) yeast (d) moong seeds
34. 34.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) writing the message (b) letting the paper dry (c) ironing the paper (d) dipping the cotton bud
36. 36.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is hot (d) soap is an acid
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the amount of water (d) the kind of salt
38. 38.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
39. 39.True or false: vinegar is needed for the leafy bag test. (a) True (b) False
40. 40.⚖️ 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

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