Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 920 · 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.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) moong seeds (c) a small bowl (d) turmeric powder
2. 2.True or false: a small bowl is needed for the secret lemon message. (a) False (b) True
3. 3.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is the one thing we change. (a) False (b) True
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧂 Which of these dissolves in water? (a) baking soda (b) sand (c) small pebbles (d) chalk powder
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a magnet (c) a spoon (d) salt
8. 8.🔍 Which is the odd one out? (a) melting ice (b) melting butter (c) freezing water (d) browning lemon ink
9. 9.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a balloon (b) a bowl (c) fresh cream (d) a timer
10. 10.True or false: putting the iron away is a job a child can do. (a) True (b) False
11. 11.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) a magnet (d) a jar with a tight lid
12. 12.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with a hot glue gun (d) with sharp wire
13. 13.True or false: sugar water keeps turmeric yellow. (a) True (b) False
14. 14.True or false: reading the message is a job for an adult. (a) True (b) False
15. 15.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
16. 16.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it changes colour (d) it can block breathing
17. 17.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) wash hands afterwards (c) lick your fingers (d) nothing is needed
18. 18.True or false: seeds on wet cotton does not sprout. (a) True (b) False
19. 19.True or false: writing the message is a job a child can do. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) soil (b) sunlight (c) warmth (d) sugar
21. 21.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
22. 22.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🧺 Which of these is needed for making butter? (a) cold water to rinse (b) turmeric powder (c) a battery cell (d) a mirror
25. 25.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) paper turns lemony (c) the juice scorches first (d) heat adds colour
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a balloon (c) an empty bottle (d) a mirror
27. 27.🛟 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
28. 28.True or false: baking soda is needed for the fizzy balloon. (a) True (b) False
29. 29.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
30. 30.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) a balloon (d) moong seeds
31. 31.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) cooking oil (d) sand
32. 32.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) the yeast is killed (d) it turns to sugar
33. 33.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) an empty bottle (c) a balloon (d) a funnel or spoon
34. 34.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
35. 35.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a balloon (c) lemon juice (d) a magnet
36. 36.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) tamarind water (c) detergent water (d) baking soda water
37. 37.🫗 How do we separate bran from wheat flour? (a) sieving (b) evaporating (c) filtering (d) handpicking
38. 38.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) much more water (d) it fills with soil
39. 39.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
40. 40.🧺 Which of these is not needed for sprouting seeds? (a) a balloon (b) a small bowl (c) moong seeds (d) cotton wool

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