Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 851 · 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 balloon is needed for the muddy water filter. (a) True (b) False
2. 2.🧺 Do we need a small bowl for the secret lemon message? (a) not needed (b) needed
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) a tray for spills (c) baking soda (d) a funnel or spoon
5. 5.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) True (b) False
6. 6.True or false: a mirror is needed for making butter. (a) True (b) False
7. 7.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a dropper or spoon (d) a balloon
8. 8.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it is much faster (c) it makes salt (d) it turns pink
9. 9.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) muddy water (c) sand and pebbles (d) yeast
10. 10.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
11. 11.True or false: sand dissolves in water. (a) True (b) False
12. 12.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is hot (c) clear water is sweet (d) germs are invisible
13. 13.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) a mirror (c) sunlight (d) vinegar
15. 15.True or false: seeds on dry cotton does not sprout. (a) False (b) True
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) a piece of string (d) warm water
17. 17.True or false: melting ice is a change that can be undone. (a) True (b) False
18. 18.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
19. 19.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) no, salt passes through (c) it turns to sugar (d) yes, all of it
20. 20.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) sugar (c) a balloon (d) baking soda
21. 21.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
22. 22.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
23. 23.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) writing stays faint (d) the paper floats
24. 24.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) blue (c) brown (d) white
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) True (b) False
26. 26.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) nothing (c) the water (d) the mud
27. 27.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) baking soda (c) a balloon (d) a funnel or spoon
28. 28.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) yeast (c) turmeric powder (d) cotton wool
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) boiled seeds (c) wet seeds by a window (d) seeds on dry cotton
31. 31.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
33. 33.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) folding paper (d) milk turning to curd
34. 34.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rinse with clean water (c) rub it hard (d) ignore it
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) True (b) False
36. 36.⚖️ 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) how hard we shake (c) time to make butter (d) the cream temperature
37. 37.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the ink is magnetic (c) the paper ate it (d) dry juice is see-through
38. 38.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
39. 39.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) rusting iron
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it

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