Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 240 · 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 job of the stem? (a) take in water from soil (b) make seeds (c) make food in sunlight (d) hold up the leaves
2. 2.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
3. 3.True or false: white paper is not needed for the secret lemon message. (a) True (b) False
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
6. 6.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
7. 7.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) the kind of balloon (c) the same bottle (d) spoons of baking soda
9. 9.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) sugar (d) chalk powder
10. 10.🧈 Which of these is a change that can be undone? (a) rusting iron (b) freezing water (c) milk turning to curd (d) baking a cake
11. 11.🫧 Which of these is an acid? (a) detergent water (b) orange juice (c) soap solution (d) sugar water
12. 12.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) turmeric powder (c) a funnel (d) a balloon
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a comb (d) dry yeast
14. 14.True or false: orange juice is an acid. (a) True (b) False
15. 15.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
16. 16.⚖️ 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) True (b) False
17. 17.🫧 Which of these is an acid? (a) detergent water (b) plain water (c) vinegar (d) sugar water
18. 18.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) soil (c) air (d) water
19. 19.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
20. 20.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it gets wet (d) it can block breathing
21. 21.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧺 Do we need a balloon for the secret lemon message? (a) needed (b) not needed
23. 23.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the amount of vinegar
25. 25.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
26. 26.True or false: detergent water is an acid. (a) False (b) True
27. 27.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🪴 Which part of a plant does this job: make seeds? (a) roots (b) stem (c) flower (d) leaves
30. 30.True or false: a mirror is needed for the fizzy balloon. (a) True (b) False
31. 31.⚖️ 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) the same dish (b) days to see crystals (c) sunny or shady place (d) the amount of water
32. 32.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
33. 33.🌱 Which of these does not sprout? (a) wet seeds by a window (b) wet seeds in the dark (c) seeds on wet cotton (d) seeds in the freezer
34. 34.🫗 Which of these is done by handpicking? (a) bad grains from rice (b) husk from rice grain (c) sugar from sugar water (d) salt from sea water
35. 35.🪴 Which part of a plant does this job: make food in sunlight? (a) roots (b) stem (c) flower (d) leaves
36. 36.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so air gets out (c) so it turns yellow (d) so cream does not spill
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
38. 38.True or false: lemon juice is needed for the secret lemon message. (a) True (b) False
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the iron setting (c) the kind of juice
40. 40.True or false: a rubber band is needed for the leafy bag test. (a) True (b) False

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