Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 810 · 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.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
2. 2.🔍 Which is the odd one out? (a) time (b) salt (c) a magnet (d) vinegar
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
5. 5.🪴 Which of these is a job of the stem? (a) hold the plant in soil (b) make seeds (c) make food in sunlight (d) hold up the leaves
6. 6.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it turns to bread (d) it shrinks to nothing
7. 7.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, if it is cold (c) yes, always (d) no, germs may stay
8. 8.🔍 Which is the odd one out? (a) rusting iron (b) melting butter (c) baking a cake (d) cooking an egg
9. 9.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is magnetic (d) soap is hot
10. 10.🧺 Do we need sugar for the fizzy balloon? (a) needed (b) not needed
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a small bottle (d) a battery cell
12. 12.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is salty (c) clear water is sweet (d) clear water is hot
13. 13.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) yeast (c) water (d) a small bowl
14. 14.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a battery cell (c) cold water to rinse (d) fresh cream
15. 15.True or false: folding paper is a change that can be undone. (a) True (b) False
16. 16.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) a shallow dish (d) a spoon
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the same bottles
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) dry yeast (c) a balloon (d) sugar
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) sugar (d) turmeric powder
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the filter material (c) the same funnel
22. 22.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
23. 23.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the same bottles (c) the amount of sugar (d) size of the balloon
25. 25.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) chemical (d) musical
26. 26.True or false: wet seeds in the dark sprouts in a few days. (a) False (b) True
27. 27.🧺 Do we need a comb for the fizzy balloon? (a) not needed (b) needed
28. 28.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
29. 29.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
30. 30.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) fresh cream (c) cold water to rinse (d) yeast
31. 31.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) cutting the lemon (c) dipping the cotton bud (d) plugging in the iron
32. 32.True or false: salt is not needed for a seed to sprout. (a) False (b) True
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a mirror (c) fresh cream (d) a jar with a tight lid
35. 35.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a potted plant (c) a mirror (d) vinegar
36. 36.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is what we measure. (a) True (b) False
37. 37.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a balloon (c) a mirror (d) a small bowl
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
40. 40.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot

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