Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 771 · 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 can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the paper ate it (c) it turned into air (d) the ink is magnetic
2. 2.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) how many seeds sprout (b) the same bowls (c) the same place (d) wet or dry cotton
3. 3.True or false: a mirror is not needed for the fizzy balloon. (a) False (b) True
4. 4.🪴 Through which part does a plant take in water from the soil? (a) the roots (b) the flowers (c) the leaves (d) the fruits
5. 5.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a seed (c) a tray for spills (d) sugar
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) reading the message (b) writing the message (c) cutting the lemon (d) dipping the cotton bud
9. 9.True or false: lemon juice is an acid. (a) True (b) False
10. 10.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
11. 11.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the kind of balloon
13. 13.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
14. 14.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
15. 15.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
16. 16.⚖️ 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 what we measure. (a) True (b) False
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the ironing time (b) the kind of juice (c) how dark the writing is (d) the same cotton bud
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) the amount of vinegar (c) size of the balloon (d) spoons of baking soda
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) rusting iron (d) freezing water
21. 21.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) plain water (b) orange juice (c) sugar water (d) salt water
23. 23.True or false: a tray for spills is needed for the fizzy balloon. (a) True (b) False
24. 24.🌱 Which of these is needed for a seed to sprout? (a) water (b) sugar (c) sunlight (d) salt
25. 25.True or false: seeds on dry cotton sprouts in a few days. (a) False (b) True
26. 26.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) cotton or cloth (c) turmeric powder (d) a clean glass
27. 27.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
28. 28.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
30. 30.True or false: soap solution is a base. (a) False (b) True
31. 31.True or false: salt from sea water is done by evaporating. (a) True (b) False
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) curd
34. 34.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) sunlight (c) a magnet (d) a potted plant
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) time (b) sugar (c) salt (d) warm water
37. 37.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) physical (c) magnetic (d) musical
38. 38.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the number of seeds (b) wet or dry cotton (c) the same bowls (d) the same place
39. 39.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a balloon (b) cotton or cloth (c) sand and pebbles (d) a funnel
40. 40.⚖️ 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) the water temperature (b) the amount of yeast (c) the same bottles (d) the amount of water

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