Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 425 · 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.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a balloon (c) cold water to rinse (d) fresh cream
2. 2.⚖️ 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 kept the same. (a) True (b) False
3. 3.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
5. 5.⚖️ 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 time we wait (b) the kind of plant (c) the size of the plant (d) sun or shade
6. 6.⚖️ 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) days to see crystals (b) the amount of water (c) the same dish (d) sunny or shady place
7. 7.True or false: rusting iron is a change that can be undone. (a) True (b) False
8. 8.🍋 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
9. 9.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
10. 10.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
11. 11.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) a rainbow (c) almost nothing (d) dark brown words
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is the one thing we change. (a) True (b) False
13. 13.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
14. 14.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
15. 15.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) make seeds (c) hold the plant in soil (d) make food in sunlight
16. 16.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
17. 17.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) stem (c) leaves (d) roots
18. 18.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
19. 19.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns blue (b) no butter forms (c) more butter forms (d) it turns to cheese
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) True (b) False
21. 21.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) muddier (c) hot (d) clearer
22. 22.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
23. 23.True or false: water is needed for a seed to sprout. (a) True (b) False
24. 24.🧺 Do we need a comb for the fizzy balloon? (a) not needed (b) needed
25. 25.True or false: a funnel or spoon is not needed for the fizzy balloon. (a) True (b) False
26. 26.🫧 Which of these is a base? (a) curd (b) detergent water (c) plain water (d) sugar water
27. 27.🧺 Which of these is not needed for sprouting seeds? (a) a magnet (b) cotton wool (c) moong seeds (d) a few days
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) sunlight (b) salt (c) soil (d) water
30. 30.True or false: salt water is a base. (a) True (b) False
31. 31.True or false: lemon juice is a base. (a) False (b) True
32. 32.True or false: freezing water is a change that cannot be undone. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) baking a cake (b) rusting iron (c) melting butter (d) browning lemon ink
34. 34.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) seeds in the freezer (d) wet seeds by a window
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🧺 Which of these is needed for the muddy water filter? (a) cotton or cloth (b) a battery cell (c) a mirror (d) a magnet
37. 37.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
38. 38.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a battery cell (c) a magnet (d) a balloon
39. 39.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
40. 40.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same place (b) how many seeds sprout (c) wet or dry cotton (d) the same bowls

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