Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 163 · 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.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
2. 2.True or false: a timer is not needed for making butter. (a) True (b) False
3. 3.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
4. 4.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
5. 5.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
6. 6.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
7. 7.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.True or false: time is something yeast needs. (a) False (b) True
9. 9.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) a balloon (d) a dropper or spoon
11. 11.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
13. 13.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
14. 14.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
15. 15.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it can block breathing (d) it changes colour
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) time to make butter (c) the amount of cream (d) the cream temperature
17. 17.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) sugar (b) a funnel or spoon (c) vinegar (d) a balloon
18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
19. 19.🔍 Which is the odd one out? (a) water (b) sunlight (c) air (d) warmth
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) days to see crystals (c) sunny or shady place
21. 21.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
22. 22.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so cream does not spill (c) so air gets out (d) so it turns yellow
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) reading the message (d) ironing the paper
26. 26.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) dark brown words (c) almost nothing (d) blue words
27. 27.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it shrinks (d) it grows bigger
28. 28.🫧 Which of these is neutral? (a) baking soda water (b) soap solution (c) vinegar (d) salt water
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
30. 30.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
31. 31.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
32. 32.🫗 Which of these is done by evaporating? (a) husk from rice grain (b) bad grains from rice (c) salt from sea water (d) mud from water
33. 33.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
34. 34.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
35. 35.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) eat a few to check (c) never put seeds in mouth (d) feed them to pets
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a comb (d) white paper strips
40. 40.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) plain water (d) detergent water

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