Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 849 · 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 needed for a seed to sprout? (a) sugar (b) soil (c) water (d) sunlight
2. 2.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the iron is brown (c) heat adds colour (d) the juice scorches first
3. 3.True or false: yeast is needed for making butter. (a) True (b) False
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a balloon (c) an empty bottle (d) a mirror
5. 5.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
6. 6.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) eat a few to check (d) never put seeds in mouth
7. 7.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) lick your fingers (d) wash hands afterwards
8. 8.🧺 Do we need a mirror for the muddy water filter? (a) needed (b) not needed
9. 9.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) yeast (b) a few hours (c) a rubber band (d) a potted plant
11. 11.⚖️ 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
12. 12.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it changes colour (d) it can block breathing
13. 13.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) lick your fingers (c) wash your hands (d) rub your eyes
14. 14.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a magnet (c) a jar with a tight lid (d) cold water to rinse
15. 15.True or false: sugar water is neutral. (a) False (b) True
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
17. 17.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) warm water (c) sugar (d) dry yeast
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) True (b) False
24. 24.True or false: sand does not dissolve in water. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) rusting iron (b) freezing water (c) baking a cake (d) browning lemon ink
26. 26.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they float apart (b) they react (c) they become magnets (d) they freeze
27. 27.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) clear water (c) powder (d) thick whipped cream
28. 28.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) keep it away from eyes (c) shake it near your face (d) put it in your mouth
29. 29.True or false: soap solution is a base. (a) True (b) False
30. 30.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
33. 33.🔍 Which is the odd one out? (a) salt water (b) plain water (c) baking soda water (d) sugar water
34. 34.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) it turns blue (c) more butter forms (d) no butter forms
35. 35.🪴 Which of these is a job of the flower? (a) make food in sunlight (b) hold up the leaves (c) carry water upward (d) make seeds
36. 36.True or false: hold the plant in soil is a job of the leaves. (a) True (b) False
37. 37.🪴 Which part of a plant does this job: make seeds? (a) flower (b) roots (c) leaves (d) stem
38. 38.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a battery cell (c) a magnet (d) a potted plant
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) size of the balloon (c) the amount of yeast (d) the water temperature
40. 40.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True

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