Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 222 · 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 needed for the fizzy balloon? (a) a battery cell (b) sugar (c) a comb (d) vinegar
2. 2.True or false: tamarind water is an acid. (a) False (b) True
3. 3.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) False (b) True
5. 5.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the number of drops
7. 7.True or false: a balloon is needed for making butter. (a) True (b) False
8. 8.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
9. 9.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
11. 11.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) blue (c) bright red (d) dark green
12. 12.True or false: soil is not needed for a seed to sprout. (a) False (b) True
13. 13.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) cotton or cloth (c) muddy water (d) yeast
14. 14.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a battery cell (c) baking soda (d) a mirror
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the same bottle
16. 16.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
17. 17.True or false: water is needed for a seed to sprout. (a) False (b) True
18. 18.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
19. 19.True or false: a timer is needed for making butter. (a) False (b) True
20. 20.🫗 Which of these is done by filtering? (a) chaff from wheat grain (b) gravel from fine sand (c) bad grains from rice (d) mud from water
21. 21.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) a balloon (c) a battery cell (d) muddy water
22. 22.True or false: a seed is not needed for the fizzy balloon. (a) True (b) False
23. 23.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
24. 24.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes
25. 25.⚖️ 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 water temperature (d) size of the balloon
26. 26.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
27. 27.🧺 Do we need yeast for making butter? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a jar with a tight lid (c) a battery cell (d) a bowl
29. 29.🌱 Is sunlight needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
30. 30.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) moong seeds (c) yeast (d) a small bowl
32. 32.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) sugar (d) warm water
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) almost nothing (b) a rainbow (c) dark brown words (d) blue words
35. 35.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
36. 36.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) browning lemon ink (d) melting butter
37. 37.🔍 Which is the odd one out? (a) baking a cake (b) melting butter (c) melting ice (d) folding paper
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) a small bottle (d) a balloon
39. 39.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) salt crystals (c) nothing at all (d) tiny water drops
40. 40.True or false: a mirror is needed for the yeast balloon. (a) False (b) True

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