Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 653 · 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: air is needed for a seed to sprout. (a) True (b) False
2. 2.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is the one thing we change. (a) False (b) True
3. 3.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
4. 4.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) soap solution (d) lemon juice
5. 5.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
6. 6.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so cream does not spill (c) so it gets hot (d) so air gets out
7. 7.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
8. 8.True or false: an empty bottle is needed for the fizzy balloon. (a) True (b) False
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is what we measure. (a) True (b) False
10. 10.⚖️ 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) sunny or shady place (b) the amount of salt (c) the same dish (d) the amount of water
11. 11.🔍 Which is the odd one out? (a) folding paper (b) dissolving salt (c) rusting iron (d) melting butter
12. 12.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) True (b) False
14. 14.True or false: curd is neutral. (a) True (b) False
15. 15.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
16. 16.🧺 Which of these is not needed for making butter? (a) a mirror (b) a bowl (c) a jar with a tight lid (d) a timer
17. 17.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a magnet (c) a rubber band (d) a mirror
18. 18.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
19. 19.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the filter traps mud (c) the water evaporates (d) the mud dissolves
20. 20.True or false: water is needed for a seed to sprout. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) chalk powder (d) table salt
22. 22.🌱 Where does a sprouting seed get its first food from? (a) food stored in the seed (b) the cotton wool (c) the sunlight only (d) the air
23. 23.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) more butter forms (c) it turns blue (d) no butter forms
24. 24.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
25. 25.⚖️ 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 same bottles (c) the amount of yeast (d) the amount of sugar
26. 26.True or false: a magnet is not needed for the secret lemon message. (a) False (b) True
27. 27.🧺 Do we need a few days for sprouting seeds? (a) needed (b) not needed
28. 28.🫧 Which of these is a base? (a) soap solution (b) vinegar (c) orange juice (d) plain water
29. 29.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) False (b) True
30. 30.🪴 Which part of a plant does this job: give out water vapour? (a) roots (b) stem (c) flower (d) leaves
31. 31.🔍 Which is the odd one out? (a) salt (b) sunlight (c) sugar (d) vinegar
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) lemon juice (d) yeast
33. 33.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) plain water (d) detergent water
34. 34.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
35. 35.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) sugar water
36. 36.🫧 Which of these is a base? (a) salt water (b) sugar water (c) detergent water (d) vinegar
37. 37.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) feed them to pets (c) eat a few to check (d) throw them at friends
38. 38.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) a battery cell (c) a magnet (d) an empty bottle
39. 39.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
40. 40.🔍 Which is the odd one out? (a) water (b) warmth (c) air (d) salt

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