Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 784 · 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: sunlight is something yeast needs. (a) False (b) True
2. 2.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
4. 4.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) turmeric powder (d) fresh cream
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
7. 7.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) wash your hands (c) skip washing (d) lick your fingers
8. 8.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) reddish (d) white at once
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) the paper ate it (c) dry juice is see-through (d) it turned into air
12. 12.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
13. 13.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) any child (c) whoever is fastest (d) the youngest child
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) False (b) True
15. 15.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🔍 Which is the odd one out? (a) cutting the lemon (b) ironing the paper (c) writing the message (d) plugging in the iron
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of water (c) days to see crystals (d) the amount of salt
19. 19.🔍 Which is the odd one out? (a) salt (b) sugar (c) a magnet (d) sunlight
20. 20.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) detergent water (d) baking soda water
21. 21.🔍 Which is the odd one out? (a) lemon juice (b) orange juice (c) vinegar (d) salt water
22. 22.True or false: air is not needed for a seed to sprout. (a) False (b) True
23. 23.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
24. 24.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the number of drops (c) the colour we see (d) the light we look in
26. 26.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
27. 27.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
28. 28.📘 What do we call plants giving out water vapour from their leaves? (a) germination (b) reflection (c) transpiration (d) digestion
29. 29.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) dipping the cotton bud (c) cutting the lemon (d) plugging in the iron
30. 30.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) turmeric powder (c) a potted plant (d) a few hours
31. 31.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a mirror (c) a potted plant (d) vinegar
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) both stay behind (c) tea stays behind (d) leaves stay behind
34. 34.🧺 Do we need a magnet for sprouting seeds? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for making butter? (a) cold water to rinse (b) turmeric powder (c) a battery cell (d) yeast
36. 36.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
37. 37.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny insects (c) nothing at all (d) tiny water drops
38. 38.🔍 Which is the odd one out? (a) melting butter (b) cooking an egg (c) milk turning to curd (d) baking a cake
39. 39.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) shake it near your face (c) put it in your mouth (d) keep it away from eyes
40. 40.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) it stays white (d) bright blue

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