Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 113 · 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 a job of the roots? (a) hold the plant in soil (b) make seeds (c) carry water upward (d) hold up the leaves
2. 2.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) never put seeds in mouth (c) eat a few to check (d) feed them to pets
3. 3.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) table salt (d) sugar
5. 5.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) warm water (d) salt
6. 6.🛟 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
7. 7.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.True or false: a magnet is needed for the secret lemon message. (a) False (b) True
10. 10.True or false: a magnet is something yeast needs. (a) True (b) False
11. 11.True or false: tamarind water is an acid. (a) True (b) False
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) turmeric powder (d) dry yeast
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) moong seeds (c) water (d) turmeric powder
16. 16.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) dark green (c) blue (d) bright red
17. 17.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
18. 18.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a balloon (d) a shallow dish
19. 19.True or false: freezing water is a change that can be undone. (a) True (b) False
20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) turmeric powder (d) yeast
21. 21.True or false: a balloon is not needed for the secret lemon message. (a) False (b) True
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) True (b) False
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) True (b) False
24. 24.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) yeast (b) cold water to rinse (c) fresh cream (d) a timer
26. 26.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) lemon juice (d) a balloon
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) baking soda water
29. 29.True or false: hold the plant in soil is a job of the stem. (a) False (b) True
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🫧 Which of these is a base? (a) curd (b) salt water (c) detergent water (d) orange juice
32. 32.⚖️ 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 the one thing we change. (a) True (b) False
33. 33.🧺 Which of these is needed for sprouting seeds? (a) moong seeds (b) a balloon (c) a magnet (d) a battery cell
34. 34.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
35. 35.True or false: sugar water is neutral. (a) False (b) True
36. 36.True or false: sugar water keeps turmeric yellow. (a) False (b) True
37. 37.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) orange juice (d) baking soda water
38. 38.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a potted plant (d) a magnet
40. 40.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) much less water (c) it fills with soil (d) exactly the same

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