Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 98 · 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.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
2. 2.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the kind of seeds (b) wet or dry cotton (c) how many seeds sprout
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a dropper or spoon (d) a magnet
4. 4.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) white paper (c) a cotton bud (d) a balloon
5. 5.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) browning lemon ink (d) melting butter
6. 6.True or false: sugar dissolves in water. (a) True (b) False
7. 7.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) helium (c) hydrogen (d) oxygen
8. 8.🧺 Do we need a mirror for the muddy water filter? (a) needed (b) not needed
9. 9.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
10. 10.🫗 Which of these is done by evaporating? (a) small stones from dal (b) mud from water (c) sugar from sugar water (d) husk from rice grain
11. 11.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) neither of them (c) the cool cloudy day (d) the hot sunny day
12. 12.True or false: cooking an egg is a change that can be undone. (a) False (b) True
13. 13.🌱 Which of these sprouts in a few days? (a) seeds on wet cotton (b) seeds in the freezer (c) boiled seeds (d) seeds on dry cotton
14. 14.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) tamarind water (d) vinegar
15. 15.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
16. 16.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
17. 17.True or false: hold up the leaves is a job of the stem. (a) True (b) False
18. 18.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it turns blue (c) it shrinks (d) there is no change
19. 19.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the number of seeds (b) the kind of seeds (c) how many seeds sprout (d) wet or dry cotton
20. 20.⚖️ 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 kept the same. (a) True (b) False
21. 21.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is magnetic (c) it is cold (d) it can burn skin
25. 25.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) salt water (c) soap solution (d) baking soda water
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
28. 28.True or false: wet seeds by a window does not sprout. (a) True (b) False
29. 29.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) baking soda water (d) plain water
30. 30.🔍 Which is the odd one out? (a) melting butter (b) melting ice (c) baking a cake (d) dissolving salt
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of water
32. 32.🧺 Which of these is needed for making butter? (a) a mirror (b) yeast (c) cold water to rinse (d) a battery cell
33. 33.🪴 Which of these is a job of the roots? (a) carry water upward (b) take in water from soil (c) hold up the leaves (d) make seeds
34. 34.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
35. 35.True or false: a balloon is not needed for the secret lemon message. (a) True (b) False
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) a magnet (d) a battery cell
38. 38.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
39. 39.True or false: turmeric powder is needed for making butter. (a) True (b) False
40. 40.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone

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