Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 564 · 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.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it turns pink (b) it makes salt (c) it takes much longer (d) it is much faster
2. 2.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it turns to sand (c) it dissolves (d) it sinks to the bottom
3. 3.True or false: tamarind water is an acid. (a) False (b) True
4. 4.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) muddy water (c) a magnet (d) sand and pebbles
6. 6.True or false: lemon juice is an acid. (a) False (b) True
7. 7.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
8. 8.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) an adult with an iron (c) a magnet (d) lemon juice
9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a comb (c) a dropper or spoon (d) turmeric powder
10. 10.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
12. 12.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) hydrogen (c) helium (d) carbon dioxide
13. 13.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
14. 14.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) nothing at all (c) salt crystals (d) tiny water drops
15. 15.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
16. 16.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) salt (c) soil (d) air
17. 17.🛟 What should you do after touching soil or seeds? (a) skip washing (b) rub your eyes (c) wash your hands (d) lick your fingers
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
19. 19.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
20. 20.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) salt water
21. 21.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the water evaporates (c) the filter traps mud (d) the mud dissolves
22. 22.True or false: cooking an egg is a change that can be undone. (a) False (b) True
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.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.True or false: a balloon is needed for making butter. (a) True (b) False
27. 27.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) seeds on wet cotton (d) seeds in the freezer
28. 28.🫧 Which of these is a base? (a) tamarind water (b) plain water (c) soap solution (d) lemon juice
29. 29.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) blue words (d) almost nothing
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is kept the same. (a) False (b) True
31. 31.⚖️ 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) the same kind of bag (c) the size of the plant (d) sun or shade
32. 32.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a balloon (b) moong seeds (c) a few days (d) cotton wool
33. 33.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
34. 34.True or false: a balloon is not needed for making butter. (a) True (b) False
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.True or false: salt water is neutral. (a) False (b) True
37. 37.🧺 Do we need a clean glass for the muddy water filter? (a) needed (b) not needed
38. 38.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
39. 39.🧺 Which of these is not needed for making butter? (a) a balloon (b) a jar with a tight lid (c) fresh cream (d) a bowl
40. 40.True or false: a balloon is needed for sprouting seeds. (a) True (b) False

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