Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 142 · 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: wet seeds in the dark does not sprout. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) browning lemon ink (b) melting butter (c) melting ice (d) dissolving salt
3. 3.True or false: salt water is a base. (a) False (b) True
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🪴 Which part of a plant does this job: hold the plant in soil? (a) stem (b) leaves (c) roots (d) flower
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.True or false: seeds on dry cotton sprouts in a few days. (a) False (b) True
8. 8.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a battery cell (c) a timer (d) fresh cream
9. 9.True or false: baking soda water is neutral. (a) True (b) False
10. 10.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) butter lumps (c) still runny cream (d) cheese
11. 11.True or false: time is something yeast needs. (a) False (b) True
12. 12.True or false: seeds in the freezer sprouts in a few days. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) water (b) warmth (c) air (d) salt
14. 14.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) an adult with an iron (c) a magnet (d) lemon juice
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a tiny root (c) a flower (d) a fruit
17. 17.🧺 Do we need a few days for sprouting seeds? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a jar with a tight lid (c) turmeric powder (d) a timer
19. 19.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
20. 20.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so air gets out (d) so cream does not spill
21. 21.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) seeds on wet cotton (c) seeds on dry cotton (d) wet seeds by a window
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a balloon (c) lemon juice (d) soap solution
23. 23.⚖️ 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) amount of water drops (b) the kind of plant (c) the time we wait (d) sun or shade
24. 24.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
25. 25.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they glow (b) they sprout faster (c) they do not sprout (d) they grow fruit
26. 26.True or false: sugar is needed for the fizzy balloon. (a) False (b) True
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) True (b) False
28. 28.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) whoever is fastest (d) the youngest child
29. 29.🧺 Do we need a mirror for the leafy bag test? (a) needed (b) not needed
30. 30.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
31. 31.🔍 Which is the odd one out? (a) cooking an egg (b) baking a cake (c) melting ice (d) milk turning to curd
32. 32.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
33. 33.True or false: muddy water is needed for the muddy water filter. (a) False (b) True
34. 34.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) turmeric powder (d) a comb
36. 36.True or false: yeast is needed for the turmeric test. (a) False (b) True
37. 37.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it sinks to the bottom (c) it dissolves (d) it turns to sand
38. 38.True or false: turmeric powder is not needed for the muddy water filter. (a) False (b) True
39. 39.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
40. 40.True or false: hold the plant in soil is a job of the stem. (a) False (b) True

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