Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 354 · 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.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) yeast (b) lemon juice (c) an adult with an iron (d) a cotton bud
2. 2.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
4. 4.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
5. 5.🧺 Do we need cotton wool for sprouting seeds? (a) needed (b) not needed
6. 6.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) baking soda (c) vinegar (d) a mirror
7. 7.True or false: turmeric powder is needed for the secret lemon message. (a) False (b) True
8. 8.True or false: freezing water is a change that can be undone. (a) True (b) False
9. 9.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a magnet (c) white paper (d) a balloon
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) True (b) False
11. 11.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) wash hands afterwards (c) nothing is needed (d) lick your fingers
12. 12.True or false: tamarind water is neutral. (a) True (b) False
13. 13.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
14. 14.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) soap solution (c) tamarind water (d) plain water
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) False (b) True
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
17. 17.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🌱 Is air needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
20. 20.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
21. 21.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
22. 22.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
23. 23.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) water (c) soap solution (d) white paper strips
24. 24.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the kind of plant (b) sun or shade (c) the time we wait (d) the size of the plant
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) the kind of juice (c) the iron setting (d) the same cotton bud
26. 26.True or false: a comb is not needed for the turmeric test. (a) False (b) True
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) False (b) True
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) milk turning to curd (c) freezing water (d) melting ice
29. 29.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
30. 30.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the balloon got cold (c) an ingredient ran out (d) the gas froze
31. 31.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) melting butter (d) rusting iron
32. 32.🌱 Which of these is not needed for a seed to sprout? (a) sunlight (b) water (c) air (d) warmth
33. 33.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
34. 34.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) hold the plant in soil (c) give out water vapour (d) make seeds
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same glass (b) how clear the water is (c) the filter material (d) the same muddy water
36. 36.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
38. 38.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they do not sprout (c) they grow fruit (d) they glow
39. 39.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) a magnet (c) turmeric powder (d) water
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) True (b) False

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