Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 234 · 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 a small bowl for sprouting seeds? (a) not needed (b) needed
2. 2.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting butter (c) freezing water (d) folding paper
3. 3.True or false: a funnel or spoon is needed for the fizzy balloon. (a) True (b) False
4. 4.🌱 Which of these is needed for a seed to sprout? (a) soil (b) air (c) sunlight (d) sugar
5. 5.True or false: make seeds is a job of the stem. (a) True (b) False
6. 6.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is what we measure. (a) False (b) True
7. 7.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) no, nothing changes (c) it is only melting (d) yes, a new gas forms
8. 8.🧺 Which of these is not needed for the secret lemon message? (a) a balloon (b) lemon juice (c) white paper (d) an adult with an iron
9. 9.True or false: yeast is not needed for the leafy bag test. (a) False (b) True
10. 10.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) blue (c) brown (d) white
11. 11.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is cold (c) no, germs may stay (d) yes, if it is clear
12. 12.🌱 What comes out of a moong seed first when it sprouts? (a) a fruit (b) a flower (c) a tiny root (d) a thorn
13. 13.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) sunlight (d) time
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) the kind of plant (c) sun or shade (d) amount of water drops
15. 15.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
16. 16.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a funnel (c) a balloon (d) a battery cell
17. 17.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
18. 18.🫧 Which of these is neutral? (a) tamarind water (b) sugar water (c) vinegar (d) soap solution
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a mirror (c) sunlight (d) a rubber band
20. 20.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so cream does not spill (c) so air gets out (d) so it turns yellow
21. 21.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
22. 22.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) water (c) air (d) sugar
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) True (b) False
24. 24.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) vinegar (d) sunlight
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) soap solution (d) vinegar
26. 26.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) table salt (b) sand (c) cooking oil (d) small pebbles
28. 28.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a comb (c) lemon juice (d) turmeric powder
29. 29.True or false: husk from rice grain is done by winnowing. (a) False (b) True
30. 30.🫗 How do we separate chaff from wheat grain? (a) handpicking (b) filtering (c) winnowing (d) evaporating
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the turmeric paper (c) the light we look in (d) the colour we see
32. 32.True or false: a battery cell is needed for the muddy water filter. (a) False (b) True
33. 33.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a battery cell (c) a magnet (d) a mirror
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) True (b) False
36. 36.🫗 Which of these is done by winnowing? (a) mud from water (b) chaff from wheat grain (c) sugar from sugar water (d) small stones from dal
37. 37.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) vinegar (d) salt water
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
39. 39.🫗 Why does filtered muddy water look clearer? (a) the filter traps mud (b) the mud dissolves (c) the filter adds soap (d) the water evaporates
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) False (b) True

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