Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 865 · 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.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) chemical (c) musical (d) physical
2. 2.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a comb (c) a battery cell (d) a tray for spills
3. 3.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) the cream temperature (c) the amount of cream (d) how hard we shake
4. 4.🧺 Do we need a jar with a tight lid for making butter? (a) not needed (b) needed
5. 5.🧺 Which of these is needed for making butter? (a) a balloon (b) a jar with a tight lid (c) a battery cell (d) a magnet
6. 6.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a small bottle (d) a balloon
8. 8.True or false: a rubber band is not needed for the leafy bag test. (a) False (b) True
9. 9.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is cold (c) no, germs may stay (d) yes, if it is clear
10. 10.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they glow (c) they grow fruit (d) they do not sprout
11. 11.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🛟 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
13. 13.🪴 Which of these is a job of the stem? (a) take in water from soil (b) give out water vapour (c) hold the plant in soil (d) carry water upward
14. 14.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
15. 15.True or false: turmeric powder is not needed for the leafy bag test. (a) True (b) False
16. 16.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
17. 17.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
18. 18.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a rubber band (c) a mirror (d) a potted plant
20. 20.🪴 Where did the water inside the bag come from? (a) the leaves (b) the rain (c) the rubber band (d) the plastic
21. 21.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a balloon (b) a funnel (c) sand and pebbles (d) muddy water
22. 22.🔍 Which is the odd one out? (a) plugging in the iron (b) writing the message (c) cutting the lemon (d) putting the iron away
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) time to make butter (c) the same jar (d) how hard we shake
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
25. 25.True or false: lemon juice is not needed for the secret lemon message. (a) False (b) True
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) size of the balloon (b) the same bottles (c) the amount of yeast (d) the water temperature
27. 27.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.True or false: melting ice is a change that can be undone. (a) False (b) True
29. 29.🪴 Through which part does a plant take in water from the soil? (a) the fruits (b) the leaves (c) the flowers (d) the roots
30. 30.🫗 How do we separate gravel from fine sand? (a) filtering (b) handpicking (c) sieving (d) evaporating
31. 31.🔍 Which is the odd one out? (a) cutting the lemon (b) ironing the paper (c) plugging in the iron (d) reading the message
32. 32.True or false: a funnel is needed for the muddy water filter. (a) False (b) True
33. 33.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a battery cell (c) a potted plant (d) a few hours
34. 34.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with sharp wire (d) with a hot glue gun
35. 35.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a comb (c) a balloon (d) an empty bottle
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the same dish (b) the amount of salt (c) sunny or shady place (d) the amount of water
39. 39.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it is sticky (c) it can burn skin (d) it is cold
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (a) True (b) False

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