Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 467 · 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 of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a piece of string (d) yeast
2. 2.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) lemon juice (d) vinegar
3. 3.True or false: hold up the leaves is a job of the leaves. (a) False (b) True
4. 4.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) the paper floats (c) writing stays faint (d) writing turns green
5. 5.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
6. 6.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) ignore it (c) add baking soda (d) rub it hard
7. 7.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) cotton wool (d) a balloon
8. 8.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
9. 9.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) cotton or cloth (d) a mirror
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a battery cell (d) salt
11. 11.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sugar (b) it turns to sand (c) no, salt passes through (d) yes, all of it
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of water (c) size of the balloon
13. 13.🧈 Why does shaking cream make butter? (a) shaking adds salt (b) the lid is warm (c) the jar adds butter (d) fat bits stick together
14. 14.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) there is no change (c) it grows bigger (d) it shrinks
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) spoons of baking soda (b) the amount of vinegar (c) the same bottle (d) size of the balloon
16. 16.🪴 Which of these is a job of the stem? (a) make food in sunlight (b) give out water vapour (c) hold the plant in soil (d) hold up the leaves
17. 17.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it floats on top (c) it sinks to the bottom (d) it dissolves
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the liquid we test (c) the colour we see (d) the number of drops
19. 19.True or false: a rubber band is needed for the leafy bag test. (a) True (b) False
20. 20.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) roots (c) leaves (d) flower
21. 21.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of salt (c) sunny or shady place
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) False (b) True
24. 24.True or false: plugging in the iron is a job a child can do. (a) True (b) False
25. 25.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) a mirror (d) water
26. 26.🍞 Which of these is something yeast does not need? (a) a magnet (b) sugar (c) time (d) warm water
27. 27.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
28. 28.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) the hot sunny day (c) the cool cloudy day (d) both the same
29. 29.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a magnet (c) water (d) cotton wool
30. 30.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) turmeric powder (c) white paper (d) a balloon
31. 31.🫧 Which of these is a base? (a) tamarind water (b) curd (c) vinegar (d) baking soda water
32. 32.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
33. 33.🧈 Before the butter appears, what does the cream turn into? (a) thick whipped cream (b) powder (c) clear water (d) ice
34. 34.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) blue (c) dark green (d) bright red
35. 35.🧺 Which of these is needed for making butter? (a) a magnet (b) a battery cell (c) fresh cream (d) a balloon
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) a balloon (d) a cotton bud
37. 37.True or false: dissolving salt is a change that can be undone. (a) True (b) False
38. 38.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) baking soda (c) a magnet (d) an empty bottle
39. 39.⚖️ 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 amount poured (c) the filter material (d) the same muddy water
40. 40.True or false: bran from wheat flour is done by filtering. (a) False (b) True

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