Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 253 · 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.True or false: warm water is something yeast needs. (a) False (b) True
2. 2.🫧 Which of these is a base? (a) soap solution (b) sugar water (c) lemon juice (d) orange juice
3. 3.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a comb (c) a tray for spills (d) baking soda
4. 4.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) lick your fingers (c) skip washing (d) rub your eyes
5. 5.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
6. 6.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
7. 7.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) the iron is brown (c) paper turns lemony (d) heat adds colour
8. 8.⚖️ 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 ironing time (c) the kind of juice
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the turmeric paper
10. 10.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a magnet (d) a pulley
11. 11.True or false: cotton or cloth is needed for the muddy water filter. (a) True (b) False
12. 12.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
13. 13.🪴 Which of these is a job of the roots? (a) carry water upward (b) hold the plant in soil (c) hold up the leaves (d) give out water vapour
14. 14.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) baking a cake (d) melting butter
15. 15.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) the paper floats (c) writing turns green (d) writing stays faint
16. 16.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a small bowl (c) lemon juice (d) yeast
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
18. 18.True or false: a clear plastic bag is needed for the leafy bag test. (a) False (b) True
19. 19.True or false: sugar is needed for the fizzy balloon. (a) True (b) False
20. 20.True or false: sunlight is not needed for the leafy bag test. (a) False (b) True
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) False (b) True
22. 22.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sand (d) food colour
23. 23.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) a jar with a tight lid (d) yeast
24. 24.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the kind of plant (b) amount of water drops (c) the size of the plant (d) the time we wait
25. 25.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) ignore it (c) rub it hard (d) add baking soda
26. 26.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) it is only melting (c) yes, a new gas forms (d) it is only dissolving
27. 27.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) sand (d) glucose powder
28. 28.🧈 What is the watery liquid left after the butter forms? (a) buttermilk (b) honey (c) oil (d) vinegar
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) turmeric powder (d) warm water
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) the same jar (c) the cream temperature (d) time to make butter
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.🧺 Which of these is not needed for the muddy water filter? (a) yeast (b) muddy water (c) cotton or cloth (d) sand and pebbles
33. 33.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
35. 35.True or false: a balloon is needed for the fizzy balloon. (a) True (b) False
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) False (b) True
37. 37.🫗 Which of these is done by winnowing? (a) tea leaves from tea (b) small stones from dal (c) bad grains from rice (d) chaff from wheat grain
38. 38.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no salt (c) they have no water (d) they have no soil
39. 39.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
40. 40.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown

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