Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 605 · 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.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
2. 2.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they react (b) they become magnets (c) they freeze (d) they float apart
3. 3.True or false: sawdust dissolves in water. (a) False (b) True
4. 4.🌱 Where does a sprouting seed get its first food from? (a) the sunlight only (b) the air (c) food stored in the seed (d) the cotton wool
5. 5.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a magnet (d) a balloon
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) sugar water (d) plain water
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
10. 10.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) it turned into air (c) the ink is magnetic (d) the paper ate it
11. 11.True or false: a mirror is needed for the fizzy balloon. (a) True (b) False
12. 12.True or false: plugging in the iron is a job a child can do. (a) True (b) False
13. 13.True or false: melting butter is a change that can be undone. (a) True (b) False
14. 14.🧺 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) white paper
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
16. 16.📘 What do we call a seed starting to grow? (a) condensation (b) pollination (c) germination (d) evaporation
17. 17.True or false: lemon juice is an acid. (a) True (b) False
18. 18.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a small bowl (c) white paper (d) a balloon
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) a few hours (c) a rubber band (d) a potted plant
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) True (b) False
21. 21.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) True (b) False
22. 22.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
23. 23.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) no, never (c) yes, they sprout (d) they turn to stones
24. 24.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
25. 25.True or false: an adult with an iron is needed for the secret lemon message. (a) True (b) False
26. 26.True or false: vinegar is something yeast needs. (a) True (b) False
27. 27.True or false: hold the plant in soil is a job of the stem. (a) False (b) True
28. 28.🧺 Do we need turmeric powder for sprouting seeds? (a) not needed (b) needed
29. 29.🧺 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
30. 30.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) reading the message (c) letting the paper dry (d) putting the iron away
31. 31.🌱 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
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 ironing time
33. 33.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it wilts and droops (c) it flowers more (d) it grows faster
34. 34.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a mirror (c) a cotton bud (d) an adult with an iron
35. 35.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) small stones from dal (c) husk from rice grain (d) bran from wheat flour
36. 36.⚖️ 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) sun or shade (b) amount of water drops (c) the same kind of bag (d) the kind of plant
37. 37.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
38. 38.True or false: salt water is an acid. (a) False (b) True
39. 39.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
40. 40.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) plugging in the iron (c) cutting the lemon (d) dipping the cotton bud

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