Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 53 · 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 the muddy water filter. Which one is NOT needed? (a) a clean glass (b) muddy water (c) a funnel (d) a battery cell
2. 2.True or false: melting ice is a change that cannot be undone. (a) True (b) False
3. 3.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the liquid we test (c) the colour we see (d) the number of drops
5. 5.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it is too big (c) it changes colour (d) it gets wet
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same glass (b) the amount poured (c) the filter material (d) how clear the water is
7. 7.🫧 Which of these is an acid? (a) orange juice (b) detergent water (c) salt water (d) soap solution
8. 8.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) skip washing (c) wash your hands (d) lick your fingers
9. 9.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) yeast (b) water (c) moong seeds (d) a few days
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) sunny or shady place (c) days to see crystals (d) the same dish
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) turmeric powder (d) yeast
13. 13.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
15. 15.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
16. 16.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
17. 17.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
18. 18.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) yeast (c) a balloon (d) a few days
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a piece of string (d) a battery cell
23. 23.🍋 Which of these steps is a job for an adult? (a) putting the iron away (b) dipping the cotton bud (c) reading the message (d) writing the message
24. 24.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) clearer (d) muddier
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
26. 26.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the liquid we test (d) the light we look in
28. 28.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
29. 29.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) clear water is hot (d) germs are invisible
30. 30.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a mirror (c) warm water (d) a spoon
33. 33.True or false: a jar with a tight lid is needed for making butter. (a) False (b) True
34. 34.True or false: a small bowl is not needed for the secret lemon message. (a) True (b) False
35. 35.True or false: curd is neutral. (a) True (b) False
36. 36.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed
37. 37.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
38. 38.🧂 Which of these dissolves in water? (a) sawdust (b) baking soda (c) chalk powder (d) cooking oil
39. 39.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
40. 40.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base

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