Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 853 · 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 is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
2. 2.🫗 How do we separate chaff from wheat grain? (a) filtering (b) winnowing (c) handpicking (d) evaporating
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
4. 4.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on wet cotton (c) boiled seeds (d) seeds on dry cotton
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) how dark the writing is (c) the same cotton bud (d) the ironing time
6. 6.🔍 Which is the odd one out? (a) sugar (b) time (c) a magnet (d) warm water
7. 7.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sand (d) sugar
8. 8.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) how many seeds sprout (c) the same bowls
9. 9.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) bubbles of gas (c) lumps of butter (d) sugar crystals
10. 10.🌱 Where does a sprouting seed get its first food from? (a) the air (b) the cotton wool (c) the sunlight only (d) food stored in the seed
11. 11.True or false: vinegar is an acid. (a) False (b) True
12. 12.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
13. 13.True or false: salt is not needed for a seed to sprout. (a) True (b) False
14. 14.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) the balloon got cold (d) an ingredient ran out
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it gets wet (d) it can block breathing
17. 17.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: letting the paper dry is a job a child can do. (a) False (b) True
19. 19.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) an indicator (d) a pulley
20. 20.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) yes, a new gas forms (c) it is only dissolving (d) it is only melting
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) lemon juice (c) water (d) turmeric powder
22. 22.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a mirror (c) fresh cream (d) a jar with a tight lid
23. 23.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
24. 24.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) soap solution (d) tamarind water
26. 26.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
27. 27.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
28. 28.🧺 Which of these is not needed for sprouting seeds? (a) cotton wool (b) a small bowl (c) moong seeds (d) a battery cell
29. 29.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) flower (c) stem (d) roots
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
32. 32.🫗 How do we separate gravel from fine sand? (a) winnowing (b) handpicking (c) sieving (d) evaporating
33. 33.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) sunlight (c) a mirror (d) a potted plant
34. 34.🔍 Which is the odd one out? (a) plugging in the iron (b) writing the message (c) cutting the lemon (d) ironing the paper
35. 35.True or false: a battery cell is needed for sprouting seeds. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) dipping the cotton bud (d) putting the iron away
37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) soap solution (d) a magnet
38. 38.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the paper ate it (c) the ink is magnetic (d) dry juice is see-through
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🫗 Which of these is done by winnowing? (a) small stones from dal (b) tea leaves from tea (c) chaff from wheat grain (d) mud from water

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