Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 462 · 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.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
2. 2.⚖️ 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) False (b) True
3. 3.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) dissolving salt (c) rusting iron (d) cooking an egg
4. 4.True or false: salt is not needed for growing salt crystals. (a) True (b) False
5. 5.True or false: baking soda is needed for the fizzy balloon. (a) False (b) True
6. 6.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
7. 7.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
8. 8.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) False (b) True
10. 10.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is salty (d) clear water is sweet
11. 11.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a timer (c) cold water to rinse (d) a balloon
12. 12.True or false: cutting the lemon is a job a child can do. (a) False (b) True
13. 13.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
14. 14.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
15. 15.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
16. 16.True or false: warm water is needed for the yeast balloon. (a) False (b) True
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) False (b) True
18. 18.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
19. 19.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
20. 20.⚖️ 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
21. 21.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a mirror (c) a battery cell (d) lemon juice
22. 22.True or false: a magnet is something yeast needs. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) ironing the paper (b) putting the iron away (c) writing the message (d) cutting the lemon
24. 24.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) salt (d) sugar
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
26. 26.🍋 Secret message: who does this step — writing the message? (a) a child can do it (b) an adult does it
27. 27.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the water temperature (c) size of the balloon (d) the amount of yeast
29. 29.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
30. 30.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
33. 33.True or false: sugar is not needed for the fizzy balloon. (a) True (b) False
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a balloon (c) turmeric powder (d) a paper clip
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) True (b) False
36. 36.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) orange juice (d) salt water
37. 37.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
38. 38.True or false: water is not needed for the turmeric test. (a) True (b) False
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is kept the same. (a) True (b) False
40. 40.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it wilts and droops (c) it turns blue (d) it flowers more

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