Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 978 · 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.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they float apart (c) they react (d) they freeze
2. 2.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
3. 3.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the rain (c) the plastic (d) the leaves
4. 4.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
6. 6.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
7. 7.True or false: a magnet is something yeast needs. (a) True (b) False
8. 8.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) skip washing (c) rub your eyes (d) lick your fingers
9. 9.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) very little fizzing (c) it turns to honey (d) the balloon bursts
10. 10.True or false: baking soda is not needed for the fizzy balloon. (a) True (b) False
11. 11.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wash hands afterwards (d) wipe hands on face
12. 12.True or false: a clear plastic bag is needed for the leafy bag test. (a) False (b) True
13. 13.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) tiny water drops (c) salt crystals (d) nothing at all
14. 14.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) turmeric powder (c) cotton or cloth (d) a clean glass
15. 15.🧈 Why does shaking cream make butter? (a) fat bits stick together (b) the jar adds butter (c) the lid is warm (d) shaking adds salt
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) yes, a new gas forms (c) no, nothing changes (d) it is only melting
18. 18.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) cold water to rinse (c) a jar with a tight lid (d) a battery cell
19. 19.True or false: tamarind water is an acid. (a) True (b) False
20. 20.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) yeast (c) moong seeds (d) a few days
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) days to see crystals (c) sunny or shady place
22. 22.True or false: writing the message is a job for an adult. (a) False (b) True
23. 23.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) sunlight (c) a rubber band (d) a magnet
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) soap solution (c) detergent water (d) baking soda water
26. 26.🔍 Which is the odd one out? (a) time (b) sunlight (c) vinegar (d) salt
27. 27.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rinse with clean water (d) rub it hard
28. 28.True or false: orange juice is an acid. (a) True (b) False
29. 29.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.True or false: melting ice is a change that can be undone. (a) True (b) False
32. 32.True or false: a mirror is not needed for the fizzy balloon. (a) True (b) False
33. 33.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
34. 34.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they are too wet (c) they have no water (d) they have no soil
35. 35.🪴 Which part of a plant does this job: make food in sunlight? (a) roots (b) leaves (c) flower (d) stem
36. 36.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) how dark the writing is (c) the same paper (d) the kind of juice
39. 39.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) shake it near your face (d) keep it away from eyes
40. 40.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown

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