Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 685 · 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 is the odd one out? (a) salt (b) sunlight (c) water (d) soil
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
3. 3.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) a clean glass (d) a battery cell
4. 4.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a mirror (b) a timer (c) fresh cream (d) a bowl
5. 5.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no water (c) they have no salt (d) they have no soil
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
7. 7.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
8. 8.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a bowl (c) a jar with a tight lid (d) yeast
9. 9.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) muddy water (c) cotton or cloth (d) sand and pebbles
10. 10.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) soap solution (c) salt water (d) sugar water
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the same bottle (c) size of the balloon
13. 13.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
14. 14.True or false: salt water is a base. (a) False (b) True
15. 15.🫗 How do we separate bran from wheat flour? (a) evaporating (b) sieving (c) winnowing (d) filtering
16. 16.🛟 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
17. 17.True or false: a magnet is needed for the secret lemon message. (a) False (b) True
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) True (b) False
19. 19.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) skip washing (c) wash your hands (d) rub your eyes
20. 20.🌱 Which of these is not needed for a seed to sprout? (a) salt (b) warmth (c) water (d) air
21. 21.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
22. 22.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
23. 23.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) rusting iron (d) baking a cake
24. 24.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
25. 25.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) glucose powder (d) sawdust
26. 26.True or false: chalk powder dissolves in water. (a) False (b) True
27. 27.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
28. 28.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
29. 29.True or false: sunlight is needed for a seed to sprout. (a) True (b) False
30. 30.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it makes salt (c) it turns pink (d) it is much faster
31. 31.🫧 Which of these is an acid? (a) plain water (b) baking soda water (c) tamarind water (d) sugar water
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the iron setting
33. 33.🧈 Before the butter appears, what does the cream turn into? (a) clear water (b) powder (c) thick whipped cream (d) ice
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) the kind of balloon (c) spoons of baking soda (d) size of the balloon
35. 35.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
36. 36.🫧 Which of these is an acid? (a) plain water (b) salt water (c) vinegar (d) soap solution
37. 37.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) cooking an egg (d) folding paper
38. 38.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🪴 Which of these is a job of the stem? (a) make seeds (b) make food in sunlight (c) carry water upward (d) hold the plant in soil

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