Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 997 · 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: dipping the cotton bud is a job for an adult. (a) True (b) False
2. 2.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
3. 3.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) no, never (c) yes, they sprout (d) they turn to stones
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) salt (d) a mirror
6. 6.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) fresh cream (c) a bowl (d) a timer
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a spoon (d) a shallow dish
9. 9.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a balloon (d) a spoon
10. 10.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) baking soda (c) a mirror (d) an empty bottle
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.⚖️ 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 colour we see (c) the number of drops (d) the turmeric paper
13. 13.True or false: a balloon is not needed for the fizzy balloon. (a) False (b) True
14. 14.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) True (b) False
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the same funnel (c) the amount poured (d) the filter material
16. 16.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
17. 17.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
21. 21.True or false: warmth is not needed for a seed to sprout. (a) False (b) True
22. 22.🌱 Which of these is not needed for a seed to sprout? (a) air (b) soil (c) water (d) warmth
23. 23.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) salt water (c) baking soda water (d) sugar water
24. 24.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) tea stays behind (c) both stay behind (d) leaves stay behind
25. 25.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) sugar (d) a comb
26. 26.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
27. 27.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
28. 28.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) ignore it (c) rub it hard (d) add baking soda
29. 29.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) turmeric powder (c) water (d) a comb
30. 30.🌱 Will these sprout: wet seeds in the dark? (a) sprouts (b) does not sprout
31. 31.True or false: turmeric powder is needed for the muddy water filter. (a) True (b) False
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) sugar (d) a magnet
33. 33.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to make it sweet (d) to colour it
34. 34.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sawdust (d) baking soda
35. 35.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a magnet (b) a few hours (c) a potted plant (d) a rubber band
36. 36.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with a hot glue gun (c) with sharp wire (d) gently, not too tight
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
38. 38.True or false: sugar water is an acid. (a) True (b) False
39. 39.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
40. 40.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) False (b) True

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