Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 407 · 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.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
2. 2.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) freezing water (d) baking a cake
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) a funnel or spoon (c) baking soda (d) vinegar
5. 5.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
7. 7.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
8. 8.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it grows bigger (d) it shrinks
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) warm water (d) a battery cell
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) the same dish (c) the kind of salt (d) days to see crystals
11. 11.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a small bowl (c) lemon juice (d) yeast
12. 12.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
13. 13.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
14. 14.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) vinegar (b) salt water (c) sugar water (d) plain water
16. 16.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) no, nothing changes (c) it is only dissolving (d) yes, a new gas forms
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.True or false: a battery cell is not needed for the secret lemon message. (a) False (b) True
19. 19.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
20. 20.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
21. 21.🔍 Which is the odd one out? (a) warmth (b) water (c) soil (d) air
22. 22.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it floats on top (c) it sinks to the bottom (d) it turns to sand
23. 23.🔍 Which is the odd one out? (a) sugar (b) water (c) sunlight (d) salt
24. 24.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) never put seeds in mouth (d) eat a few to check
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the amount poured (c) the same glass (d) how clear the water is
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the turmeric paper
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) cotton or cloth (c) sand and pebbles (d) yeast
29. 29.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is what we measure. (a) False (b) True
30. 30.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
31. 31.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
32. 32.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it turns pink (c) it is much faster (d) it makes salt
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is the one thing we change. (a) True (b) False
34. 34.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) germination (c) digestion (d) transpiration
35. 35.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) only an adult (c) the youngest child (d) any child
36. 36.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) writing the message (d) cutting the lemon
37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) soap solution (c) white paper strips (d) a dropper or spoon
38. 38.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
39. 39.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it gets wet (c) it is too big (d) it changes colour
40. 40.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed

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