Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 625 · 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.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so it turns yellow (c) so air gets out (d) so cream does not spill
2. 2.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
3. 3.🧺 Do we need a magnet for making butter? (a) needed (b) not needed
4. 4.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
5. 5.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
6. 6.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the kind of plant (b) sun or shade (c) the size of the plant (d) the time we wait
8. 8.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, if cooled (c) no, it stays brown (d) yes, in the dark
9. 9.🔮 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) green (d) reddish
10. 10.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
11. 11.True or false: white paper is not needed for the secret lemon message. (a) False (b) True
12. 12.True or false: water is needed for sprouting seeds. (a) False (b) True
13. 13.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
14. 14.True or false: soil is needed for a seed to sprout. (a) False (b) True
15. 15.True or false: a magnet is needed for the fizzy balloon. (a) True (b) False
16. 16.🎈 Why does the balloon blow up? (a) gas is made inside (b) vinegar is hot (c) the bottle shrinks (d) outside air gets in
17. 17.True or false: a bowl is not needed for making butter. (a) True (b) False
18. 18.True or false: detergent water is an acid. (a) True (b) False
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) a potted plant (c) a clear plastic bag (d) sunlight
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
21. 21.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) dry yeast (d) warm water
23. 23.True or false: sugar is something yeast needs. (a) False (b) True
24. 24.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
25. 25.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
27. 27.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
28. 28.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) fresh cream (c) a mirror (d) a jar with a tight lid
30. 30.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
31. 31.True or false: fresh cream is needed for making butter. (a) True (b) False
32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
33. 33.True or false: sugar is not needed for the fizzy balloon. (a) False (b) True
34. 34.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) an adult with an iron (c) a mirror (d) a balloon
35. 35.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) nothing (d) the water
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) white paper strips (d) water
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a magnet (d) a spoon
38. 38.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) blue (d) green
39. 39.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) a bowl (d) a battery cell
40. 40.True or false: a magnet is needed for sprouting seeds. (a) False (b) True

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