Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 327 · 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: a piece of string is needed for growing salt crystals. (a) True (b) False
2. 2.⚖️ 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 yeast (c) size of the balloon
3. 3.True or false: freezing water is a change that cannot be undone. (a) False (b) True
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a balloon (d) an adult with an iron
6. 6.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) it turns to ice (c) nothing at all (d) lots of fizzy bubbles
7. 7.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
8. 8.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) shake it near your face (c) put it in your mouth (d) keep it away from eyes
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the filter material (c) the same funnel
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
11. 11.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) a tray for spills (c) sugar (d) vinegar
12. 12.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.True or false: seeds on dry cotton sprouts in a few days. (a) False (b) True
15. 15.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a tiny living fungus (d) a kind of salt
16. 16.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) yeast (b) a jar with a tight lid (c) cold water to rinse (d) a bowl
17. 17.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
19. 19.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
20. 20.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
21. 21.True or false: a magnet is not needed for the muddy water filter. (a) False (b) True
22. 22.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
23. 23.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) blue (c) white (d) green
24. 24.True or false: a mirror is not needed for the leafy bag test. (a) False (b) True
25. 25.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) baking a cake (d) melting butter
26. 26.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) small pebbles (d) table salt
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) False (b) True
28. 28.🧈 Why does shaking cream make butter? (a) fat bits stick together (b) the lid is warm (c) shaking adds salt (d) the jar adds butter
29. 29.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
30. 30.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) a magnet (d) lemon juice
31. 31.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) water (d) a balloon
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) False (b) True
33. 33.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
34. 34.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
35. 35.True or false: a magnet is not needed for the leafy bag test. (a) False (b) True
36. 36.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) baking soda (d) sand
37. 37.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) cotton or cloth (c) sand and pebbles (d) yeast
38. 38.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) folding paper (d) melting ice
39. 39.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) dissolving salt (d) rusting iron
40. 40.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter adds soap (c) the mud dissolves (d) the filter traps mud

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