Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 263 · 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: warm water is needed for the yeast balloon. (a) False (b) True
2. 2.🌱 Will these sprout: seeds in the freezer? (a) sprouts (b) does not sprout
3. 3.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) muddy water (c) a balloon (d) turmeric powder
4. 4.True or false: glucose powder does not dissolve in water. (a) True (b) False
5. 5.True or false: give out water vapour is a job of the leaves. (a) False (b) True
6. 6.True or false: hold the plant in soil is a job of the leaves. (a) True (b) False
7. 7.True or false: folding paper is a change that can be undone. (a) True (b) False
8. 8.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
9. 9.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.🛟 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
11. 11.True or false: dissolving salt is a change that can be undone. (a) False (b) True
12. 12.⚖️ 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 the one thing we change. (a) False (b) True
13. 13.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much more water (c) exactly the same (d) much less water
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) spoons of baking soda (b) the same bottle (c) size of the balloon (d) the amount of vinegar
16. 16.True or false: salt from sea water is done by sieving. (a) True (b) False
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.True or false: yeast is needed for the leafy bag test. (a) True (b) False
19. 19.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
20. 20.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
21. 21.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
22. 22.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) sunlight (c) yeast (d) a clear plastic bag
23. 23.🔍 Which is the odd one out? (a) browning lemon ink (b) freezing water (c) milk turning to curd (d) rusting iron
24. 24.🌱 What comes out of a moong seed first when it sprouts? (a) a tiny root (b) a thorn (c) a flower (d) a fruit
25. 25.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) a cotton bud (c) white paper (d) turmeric powder
26. 26.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) glucose powder (d) cooking oil
27. 27.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) False (b) True
29. 29.True or false: wet seeds by a window sprouts in a few days. (a) False (b) True
30. 30.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it turns blue (d) it disappears
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) False (b) True
32. 32.🫗 How do we separate tea leaves from tea? (a) handpicking (b) evaporating (c) sieving (d) filtering
33. 33.⚖️ 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
34. 34.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) eat a few to check (c) feed them to pets (d) throw them at friends
35. 35.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) the mud (c) nothing (d) the salt
36. 36.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the hot sunny day (b) the cool cloudy day (c) both the same (d) neither of them
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
38. 38.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) cutting the lemon (c) putting the iron away (d) writing the message
39. 39.True or false: turmeric powder is needed for the leafy bag test. (a) True (b) False
40. 40.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) cutting the lemon (d) reading the message

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