Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 246 · 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 sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) wet seeds in the dark (d) seeds on dry cotton
2. 2.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
3. 3.True or false: a magnet is needed for the turmeric test. (a) True (b) False
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
5. 5.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) petals (b) roots (c) stomata (d) veins
6. 6.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
7. 7.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
8. 8.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
9. 9.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) table salt (d) sawdust
10. 10.True or false: melting butter is a change that cannot be undone. (a) True (b) False
11. 11.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
12. 12.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) cooking oil (d) table salt
13. 13.True or false: warm water is something yeast does not need. (a) False (b) True
14. 14.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a magnet (b) lemon juice (c) a small bowl (d) white paper
15. 15.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) no butter forms (c) it turns blue (d) more butter forms
16. 16.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
17. 17.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much more water (c) much less water (d) it fills with soil
18. 18.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) chemical (c) musical (d) physical
19. 19.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we keep it the same (b) we change it (c) we measure it
20. 20.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) the yeast is killed (d) it grows faster
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) dry yeast (c) warm water (d) sugar
22. 22.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is kept the same. (a) False (b) True
24. 24.⚖️ 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) amount of water drops (c) the time we wait (d) sun or shade
25. 25.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a dropper or spoon (d) a magnet
26. 26.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) water (c) a balloon (d) a few days
27. 27.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
28. 28.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
29. 29.🫗 How do we separate small stones from dal? (a) handpicking (b) sieving (c) evaporating (d) winnowing
30. 30.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
31. 31.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) only an adult (d) the youngest child
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) soap solution (d) lemon juice
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
35. 35.🫧 Which of these is a base? (a) tamarind water (b) detergent water (c) orange juice (d) salt water
36. 36.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) a funnel or spoon (d) a tray for spills
37. 37.🫧 Which of these is an acid? (a) lemon juice (b) salt water (c) sugar water (d) soap solution
38. 38.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) lick your fingers (d) wash hands afterwards
39. 39.True or false: reading the message is a job a child can do. (a) False (b) True
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 what we measure. (a) False (b) True

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