Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 164 · 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.🔍 Which is the odd one out? (a) warmth (b) water (c) sugar (d) air
2. 2.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) freezing water (b) dissolving salt (c) melting butter (d) rusting iron
4. 4.True or false: plain water keeps turmeric yellow. (a) False (b) True
5. 5.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) boiled seeds (d) wet seeds in the dark
6. 6.True or false: bran from wheat flour is done by handpicking. (a) False (b) True
7. 7.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they glow (b) they grow fruit (c) they do not sprout (d) they sprout faster
8. 8.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) amount of water drops (b) the time we wait (c) the kind of plant (d) the same kind of bag
9. 9.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a balloon (b) a small bowl (c) water (d) cotton wool
10. 10.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) vinegar (c) a comb (d) a balloon
11. 11.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
12. 12.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a battery cell (c) moong seeds (d) cotton wool
13. 13.⚖️ 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) the cream temperature (c) how hard we shake (d) the amount of cream
14. 14.True or false: a battery cell is needed for the muddy water filter. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) plugging in the iron (b) writing the message (c) putting the iron away (d) ironing the paper
16. 16.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
17. 17.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
18. 18.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) folding paper (c) melting ice (d) melting butter
19. 19.⚖️ 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 amount of sugar (c) the amount of yeast (d) size of the balloon
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
21. 21.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they have no water (c) they are too wet (d) they have no salt
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.True or false: baking soda water is an acid. (a) True (b) False
24. 24.True or false: hold the plant in soil is a job of the roots. (a) False (b) True
25. 25.True or false: curd is a base. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) letting the paper dry (b) putting the iron away (c) dipping the cotton bud (d) reading the message
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
29. 29.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with sharp wire (d) with a hot glue gun
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
31. 31.True or false: a magnet is not needed for the muddy water filter. (a) False (b) True
32. 32.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a paper clip (d) a magnet
34. 34.🧺 Do we need a battery cell for making butter? (a) needed (b) not needed
35. 35.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same bowls (b) wet or dry cotton (c) how many seeds sprout
36. 36.True or false: a mirror is not needed for sprouting seeds. (a) True (b) False
37. 37.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
38. 38.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
39. 39.🫧 Which of these is a base? (a) soap solution (b) curd (c) orange juice (d) vinegar
40. 40.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) helium (c) oxygen (d) hydrogen

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