Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 33 · 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 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 glass
2. 2.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) a small bowl (c) yeast (d) a few days
3. 3.🫗 How do we separate mud from water? (a) filtering (b) evaporating (c) sieving (d) handpicking
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) how hard we shake (c) the same jar (d) the cream temperature
5. 5.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) a magnet (d) sugar
6. 6.🍋 Which of these steps is a job for an adult? (a) putting the iron away (b) letting the paper dry (c) dipping the cotton bud (d) reading the message
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
8. 8.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
9. 9.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) it turns to sugar (c) yes, all of it (d) no, salt passes through
10. 10.True or false: wet seeds in the dark sprouts in a few days. (a) True (b) False
11. 11.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) reddish (d) green
12. 12.🧺 Which of these is needed for making butter? (a) a bowl (b) a magnet (c) a balloon (d) a battery cell
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
14. 14.True or false: detergent water is an acid. (a) True (b) False
15. 15.True or false: melting butter is a change that cannot be undone. (a) False (b) True
16. 16.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves pass through (c) both stay behind (d) leaves stay behind
17. 17.🌱 Seeds need water, air and ___ to sprout. (a) soil (b) sugar (c) warmth (d) salt
18. 18.🌱 Where does a sprouting seed get its first food from? (a) the air (b) food stored in the seed (c) the sunlight only (d) the cotton wool
19. 19.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) seeds in the freezer (d) seeds on wet cotton
20. 20.🪴 Which part of a plant does this job: make seeds? (a) roots (b) stem (c) flower (d) leaves
21. 21.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) sugar (d) a paper clip
23. 23.⚖️ 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) size of the balloon (c) the amount of sugar
24. 24.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) blue words (d) almost nothing
25. 25.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
26. 26.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
28. 28.True or false: turmeric powder is needed for sprouting seeds. (a) False (b) True
29. 29.🛟 What should you do after touching soil or seeds? (a) skip washing (b) rub your eyes (c) wash your hands (d) lick your fingers
30. 30.True or false: rusting iron is a change that can be undone. (a) False (b) True
31. 31.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
32. 32.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
33. 33.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a balloon (b) fresh cream (c) a jar with a tight lid (d) cold water to rinse
34. 34.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
35. 35.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it can block breathing (c) it changes colour (d) it gets wet
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the turmeric paper
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
38. 38.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is the one thing we change. (a) False (b) True
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same

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