Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 348 · 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 fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) baking soda (c) vinegar (d) a magnet
2. 2.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
3. 3.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a mirror (b) a small bowl (c) moong seeds (d) cotton wool
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.🧺 Do we need turmeric powder for the secret lemon message? (a) not needed (b) needed
6. 6.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if cooled (c) no, it stays brown (d) yes, if shaken
7. 7.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) the balloon bursts (c) it turns to honey (d) a huge eruption
8. 8.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
9. 9.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
10. 10.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a comb (d) lemon juice
12. 12.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the same kind of bag
14. 14.🧺 Which of these is needed for making butter? (a) a jar with a tight lid (b) a magnet (c) a balloon (d) a battery cell
15. 15.True or false: time is something yeast does not need. (a) True (b) False
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.True or false: tamarind water is an acid. (a) False (b) True
18. 18.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) reddish-brown (d) it stays white
19. 19.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) warmth (b) water (c) air (d) sugar
21. 21.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) vinegar (c) a tray for spills (d) sugar
23. 23.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
24. 24.🪴 Which of these is a job of the stem? (a) take in water from soil (b) make food in sunlight (c) carry water upward (d) make seeds
25. 25.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it turns to sand (c) it dissolves (d) it sinks to the bottom
26. 26.🔍 Which is the odd one out? (a) cutting the lemon (b) dipping the cotton bud (c) ironing the paper (d) plugging in the iron
27. 27.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) False (b) True
29. 29.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
30. 30.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) petals (c) roots (d) stomata
31. 31.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a balloon (c) a battery cell (d) a tray for spills
32. 32.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) tiny insects (c) salt crystals (d) nothing at all
33. 33.🔍 Which is the odd one out? (a) ironing the paper (b) putting the iron away (c) plugging in the iron (d) reading the message
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is kept the same. (a) False (b) True
35. 35.True or false: muddy water is not needed for the muddy water filter. (a) False (b) True
36. 36.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) chalk powder (d) table salt
37. 37.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) True (b) False
39. 39.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a magnet (c) vinegar (d) a balloon
40. 40.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) detergent water (d) baking soda water

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