Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 817 · 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 balloon (b) a funnel or spoon (c) an empty bottle (d) a magnet
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) a battery cell
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a spoon (c) turmeric powder (d) a balloon
4. 4.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) writing the message (c) letting the paper dry (d) dipping the cotton bud
5. 5.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) sugar (d) table salt
6. 6.True or false: chalk powder dissolves in water. (a) False (b) True
7. 7.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) a rainbow (d) almost nothing
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a balloon (c) a mirror (d) yeast
10. 10.⚖️ 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) False (b) True
11. 11.⚖️ 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
12. 12.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
13. 13.🛟 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
14. 14.True or false: yeast is not needed for the secret lemon message. (a) False (b) True
15. 15.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with a hot glue gun (c) gently, not too tight (d) with sharp wire
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the same dish
18. 18.🔍 Which is the odd one out? (a) reading the message (b) dipping the cotton bud (c) letting the paper dry (d) ironing the paper
19. 19.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
20. 20.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
21. 21.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) lemon juice (c) white paper (d) a magnet
23. 23.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) tamarind water (d) baking soda water
24. 24.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) an adult with an iron (c) lemon juice (d) yeast
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same muddy water (b) how clear the water is (c) the filter material
26. 26.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) melting ice (d) baking a cake
27. 27.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a mirror (c) a bowl (d) a timer
28. 28.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) very little fizzing (c) it turns to honey (d) a huge eruption
29. 29.True or false: yeast is needed for the muddy water filter. (a) False (b) True
30. 30.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) a battery cell (d) an adult with an iron
32. 32.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
33. 33.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
34. 34.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) a mirror (c) a clear plastic bag (d) yeast
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) water (c) a dropper or spoon (d) white paper strips
36. 36.🫗 Which of these is done by evaporating? (a) bran from wheat flour (b) husk from rice grain (c) tea leaves from tea (d) sugar from sugar water
37. 37.True or false: plain water is neutral. (a) False (b) True
38. 38.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
39. 39.🧺 Which of these is needed for the leafy bag test? (a) a rubber band (b) a battery cell (c) a mirror (d) vinegar
40. 40.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed

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