Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 562 · 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.True or false: dissolving salt is a change that can be undone. (a) True (b) False
2. 2.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) an ingredient ran out (c) the bottle got tired (d) the balloon got cold
4. 4.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wash hands afterwards (c) lick your fingers (d) wipe hands on face
5. 5.🔍 Which is the odd one out? (a) air (b) water (c) sunlight (d) warmth
6. 6.🧺 Do we need a funnel for the muddy water filter? (a) needed (b) not needed
7. 7.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
8. 8.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) ignore it (c) rub it hard (d) rinse with clean water
9. 9.🌱 Which of these is not needed for a seed to sprout? (a) water (b) air (c) warmth (d) salt
10. 10.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) wash your hands (c) lick your fingers (d) skip washing
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.True or false: melting ice is a change that can be undone. (a) False (b) True
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the amount of sugar (d) the water temperature
14. 14.🌱 Where does a sprouting seed get its first food from? (a) food stored in the seed (b) the cotton wool (c) the air (d) the sunlight only
15. 15.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a comb (c) sugar (d) dry yeast
18. 18.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) cooking an egg (d) dissolving salt
19. 19.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
20. 20.True or false: an empty bottle is needed for the fizzy balloon. (a) True (b) False
21. 21.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) keep it away from eyes (c) shake it near your face (d) seal it in a glass jar
22. 22.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) a balloon (d) a timer
23. 23.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) detergent water (c) lemon juice (d) vinegar
24. 24.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) cooking oil (d) table salt
25. 25.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a mirror (c) a magnet (d) a tray for spills
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
27. 27.🪴 Which of these is a job of the stem? (a) give out water vapour (b) make seeds (c) hold up the leaves (d) hold the plant in soil
28. 28.True or false: sugar is something yeast does not need. (a) True (b) False
29. 29.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
31. 31.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
32. 32.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) small pebbles (d) table salt
33. 33.True or false: a magnet is needed for the fizzy balloon. (a) False (b) True
34. 34.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) carbon dioxide (c) oxygen (d) helium
35. 35.🔍 Which is the odd one out? (a) cutting the lemon (b) writing the message (c) ironing the paper (d) putting the iron away
36. 36.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) dark green (c) bright red (d) blue
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.True or false: a battery cell is not needed for the muddy water filter. (a) True (b) False
39. 39.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
40. 40.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they melt (c) they turn to stones (d) yes, they sprout

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