Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 103 · 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 moong seeds for sprouting seeds? (a) not needed (b) needed
2. 2.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a small bowl (c) a balloon (d) a mirror
3. 3.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
6. 6.True or false: yeast is needed for the turmeric test. (a) True (b) False
7. 7.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) yeast (c) vinegar (d) a potted plant
9. 9.🪴 Which of these is a job of the stem? (a) take in water from soil (b) give out water vapour (c) hold up the leaves (d) hold the plant in soil
10. 10.🧺 Which of these is not needed for making butter? (a) a timer (b) a balloon (c) a bowl (d) fresh cream
11. 11.⚖️ 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
12. 12.True or false: melting butter is a change that cannot be undone. (a) True (b) False
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) turmeric powder (c) water (d) lemon juice
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.🔍 Which is the odd one out? (a) plain water (b) salt water (c) baking soda water (d) lemon juice
17. 17.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sugar (d) glucose powder
18. 18.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) sawdust (d) sand
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) yeast (c) a potted plant (d) a clear plastic bag
20. 20.🧺 Do we need a mirror for sprouting seeds? (a) not needed (b) needed
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) True (b) False
23. 23.📘 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 dissolving (d) it is only melting
24. 24.True or false: vinegar is an acid. (a) False (b) True
25. 25.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a mirror (c) a comb (d) a tray for spills
26. 26.⚖️ 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
27. 27.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it gets hot (c) so it turns yellow (d) so air gets out
28. 28.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
29. 29.🧺 Do we need a rubber band for the leafy bag test? (a) needed (b) not needed
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) vinegar (c) a seed (d) sugar
32. 32.⚖️ 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 kept the same. (a) False (b) True
33. 33.🧺 Which of these is needed for the secret lemon message? (a) an adult with an iron (b) a magnet (c) a balloon (d) turmeric powder
34. 34.🛟 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
35. 35.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) paper turns lemony (c) the juice scorches first (d) heat adds colour
36. 36.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) warm water (d) a mirror
38. 38.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
39. 39.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False

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