Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 766 · 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.True or false: a rubber band is needed for the leafy bag test. (a) False (b) True
2. 2.True or false: mud from water is done by filtering. (a) False (b) True
3. 3.True or false: vinegar is an acid. (a) True (b) False
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🎈 Why does the balloon blow up? (a) outside air gets in (b) the bottle shrinks (c) gas is made inside (d) vinegar is hot
6. 6.🌱 Which of these is not needed for a seed to sprout? (a) water (b) warmth (c) soil (d) air
7. 7.True or false: a balloon is not needed for sprouting seeds. (a) False (b) True
8. 8.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) a cotton bud (c) an adult with an iron (d) yeast
9. 9.🧺 Do we need a magnet for making butter? (a) needed (b) not needed
10. 10.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.True or false: hold the plant in soil is a job of the roots. (a) True (b) False
12. 12.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) it turned into air (c) the paper ate it (d) dry juice is see-through
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same funnel (c) the same glass (d) the filter material
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
15. 15.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) how dark the writing is (c) the same cotton bud (d) the same paper
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🧺 Do we need a battery cell for the secret lemon message? (a) not needed (b) needed
19. 19.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
20. 20.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a cotton bud (c) a mirror (d) lemon juice
21. 21.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
22. 22.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
23. 23.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) milk turning to curd (d) browning lemon ink
24. 24.🔍 Which is the odd one out? (a) vinegar (b) time (c) a magnet (d) salt
25. 25.🫗 How do we separate sugar from sugar water? (a) evaporating (b) filtering (c) sieving (d) handpicking
26. 26.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
27. 27.🔍 Which is the odd one out? (a) air (b) warmth (c) sugar (d) water
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
30. 30.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a few days (c) water (d) a battery cell
31. 31.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) baking a cake (d) freezing water
32. 32.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
33. 33.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) how many seeds sprout (b) the kind of seeds (c) the same bowls (d) wet or dry cotton
34. 34.🫗 Which of these is done by winnowing? (a) small stones from dal (b) salt from sea water (c) tea leaves from tea (d) chaff from wheat grain
35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
36. 36.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
37. 37.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it turns pink (b) it makes salt (c) it takes much longer (d) it is much faster
38. 38.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is kept the same. (a) True (b) False
39. 39.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) a mirror (c) moong seeds (d) yeast
40. 40.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it turns to sand (c) it floats on top (d) it dissolves

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