Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 119 · 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.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it shrinks to nothing (d) it turns to bread
2. 2.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) blue (c) pale yellow (d) bright red
3. 3.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the balloon got cold (c) the bottle got tired (d) an ingredient ran out
4. 4.True or false: a cotton bud is not needed for the secret lemon message. (a) False (b) True
5. 5.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
6. 6.True or false: a balloon is not needed for the fizzy balloon. (a) False (b) True
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a spoon (d) a piece of string
8. 8.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it grows bigger (d) it shrinks
9. 9.🧂 Which of these dissolves in water? (a) sand (b) sugar (c) chalk powder (d) small pebbles
10. 10.🫗 How do we separate bran from wheat flour? (a) handpicking (b) filtering (c) evaporating (d) sieving
11. 11.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
12. 12.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
13. 13.True or false: writing the message is a job for an adult. (a) True (b) False
14. 14.🧺 Do we need a timer for making butter? (a) needed (b) not needed
15. 15.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the amount poured (b) the same funnel (c) the filter material (d) the same muddy water
18. 18.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) germs are invisible (d) clear water is sweet
21. 21.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a magnet (d) a prism
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the amount poured
23. 23.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) a magnet (c) a few days (d) a mirror
24. 24.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
26. 26.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) roots (c) flower (d) stem
27. 27.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a magnet (c) a cotton bud (d) a small bowl
29. 29.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) sunlight (c) salt (d) warmth
30. 30.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
31. 31.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) much more water (c) it fills with soil (d) exactly the same
32. 32.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a balloon (c) a comb (d) an empty bottle
33. 33.⚖️ 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 what we measure. (a) True (b) False
34. 34.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
35. 35.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) cotton or cloth (d) yeast
37. 37.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
38. 38.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
39. 39.True or false: plain water is neutral. (a) True (b) False
40. 40.True or false: white paper is not needed for the secret lemon message. (a) False (b) True

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