Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 785 · 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 is the odd one out? (a) salt water (b) sugar water (c) plain water (d) soap solution
2. 2.True or false: ironing the paper is a job a child can do. (a) False (b) True
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a mirror (d) a spoon
4. 4.True or false: make seeds is a job of the flower. (a) False (b) True
5. 5.True or false: reading the message is a job for an adult. (a) True (b) False
6. 6.⚖️ 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 the one thing we change. (a) True (b) False
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
8. 8.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
9. 9.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) yes, a new gas forms (c) it is only melting (d) it is only dissolving
10. 10.🔍 Which is the odd one out? (a) plugging in the iron (b) reading the message (c) dipping the cotton bud (d) writing the message
11. 11.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
12. 12.🫧 Which of these is an acid? (a) plain water (b) baking soda water (c) orange juice (d) sugar water
13. 13.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) brown (d) white
14. 14.🔍 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
15. 15.True or false: a few hours is needed for the leafy bag test. (a) False (b) True
16. 16.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) a magnet (c) a battery cell (d) a few days
17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
18. 18.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) cheese (c) still runny cream (d) butter lumps
19. 19.🪴 Which of these is a job of the stem? (a) give out water vapour (b) carry water upward (c) make food in sunlight (d) hold the plant in soil
20. 20.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it turns pink (c) it makes salt (d) it is much faster
21. 21.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, if shaken (d) yes, in the dark
22. 22.🧺 Which of these is not needed for sprouting seeds? (a) water (b) a few days (c) a small bowl (d) a mirror
23. 23.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
24. 24.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) a funnel (c) yeast (d) a magnet
26. 26.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
27. 27.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
28. 28.🍋 Which of these steps is a job for an adult? (a) reading the message (b) plugging in the iron (c) letting the paper dry (d) dipping the cotton bud
29. 29.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) skip washing
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
31. 31.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
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 change it (b) we keep it the same (c) we measure it
33. 33.True or false: yeast is not needed for the secret lemon message. (a) False (b) True
34. 34.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the gas froze (c) an ingredient ran out (d) the bottle got tired
35. 35.🪴 Which of these is a job of the leaves? (a) hold the plant in soil (b) hold up the leaves (c) give out water vapour (d) make seeds
36. 36.🧺 Which of these is not needed for the leafy bag test? (a) yeast (b) a few hours (c) a potted plant (d) a clear plastic bag
37. 37.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) browning lemon ink (d) rusting iron
38. 38.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) melting butter (d) milk turning to curd
39. 39.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a battery cell (c) a tray for spills (d) a magnet
40. 40.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone

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