Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 468 · 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.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) time to make butter (c) the amount of cream (d) the cream temperature
2. 2.🧈 Before the butter appears, what does the cream turn into? (a) powder (b) ice (c) thick whipped cream (d) clear water
3. 3.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) size of the balloon (b) the same bottles (c) the water temperature (d) the amount of sugar
5. 5.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
7. 7.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is sticky (c) it can burn skin (d) it is magnetic
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
10. 10.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a jar with a tight lid (c) a timer (d) a magnet
11. 11.🧺 Do we need yeast for the leafy bag test? (a) needed (b) not needed
12. 12.True or false: a comb is not needed for the turmeric test. (a) False (b) True
13. 13.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) no, salt passes through (c) it turns to sugar (d) yes, all of it
14. 14.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) freezing water (b) melting ice (c) melting butter (d) cooking an egg
16. 16.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
19. 19.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the time we wait
20. 20.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) petals (c) veins (d) stomata
21. 21.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
22. 22.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) fresh cream (c) a jar with a tight lid (d) a battery cell
23. 23.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) soap solution (d) baking soda water
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a comb (d) sugar
26. 26.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) transpiration (c) digestion (d) germination
27. 27.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) spoons of baking soda (c) size of the balloon (d) the kind of balloon
28. 28.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.🫧 Which of these is a base? (a) curd (b) orange juice (c) detergent water (d) lemon juice
30. 30.🫧 Which of these is an acid? (a) detergent water (b) plain water (c) sugar water (d) orange juice
31. 31.🛟 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
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a piece of string (d) a mirror
33. 33.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) soap solution (d) a battery cell
34. 34.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a balloon (c) a battery cell (d) yeast
35. 35.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) steam (d) air from outside
36. 36.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
37. 37.True or false: a magnet is needed for the muddy water filter. (a) True (b) False
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) True (b) False
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a magnet (b) a clear plastic bag (c) a rubber band (d) sunlight
40. 40.🌱 What comes out of a moong seed first when it sprouts? (a) a flower (b) a thorn (c) a fruit (d) a tiny root

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