Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 105 · 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.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) eat a few to check (c) throw them at friends (d) never put seeds in mouth
2. 2.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it can block breathing (d) it changes colour
3. 3.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) vinegar (d) detergent water
4. 4.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the juice scorches first (c) heat adds colour (d) the iron is brown
5. 5.True or false: curd is an acid. (a) False (b) True
6. 6.True or false: lemon juice is needed for the secret lemon message. (a) True (b) False
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) a mirror (d) water
8. 8.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) yeast (c) a small bowl (d) moong seeds
9. 9.True or false: sugar water is neutral. (a) True (b) False
10. 10.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rinse with clean water (c) rub it hard (d) add baking soda
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) True (b) False
12. 12.🧺 Do we need a battery cell for the fizzy balloon? (a) needed (b) not needed
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sugar (d) a magnet
15. 15.🪴 Which part of a plant does this job: hold up the leaves? (a) roots (b) stem (c) flower (d) leaves
16. 16.True or false: plain water is neutral. (a) True (b) False
17. 17.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
18. 18.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) a tray for spills (c) baking soda (d) an empty bottle
20. 20.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
21. 21.⚖️ 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
22. 22.🪴 Which of these is a job of the roots? (a) take in water from soil (b) give out water vapour (c) carry water upward (d) make seeds
23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) water (d) a magnet
24. 24.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
25. 25.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
26. 26.True or false: a battery cell is needed for sprouting seeds. (a) False (b) True
27. 27.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
28. 28.True or false: turmeric powder is needed for sprouting seeds. (a) True (b) False
29. 29.True or false: tamarind water is an acid. (a) True (b) False
30. 30.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a battery cell (c) yeast (d) a timer
31. 31.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sugar (d) small pebbles
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
33. 33.True or false: a mirror is needed for the leafy bag test. (a) True (b) False
34. 34.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) the youngest child (c) any child (d) only an adult
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the number of drops
38. 38.🪴 Where did the water inside the bag come from? (a) the plastic (b) the leaves (c) the rubber band (d) the rain
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) True (b) False
40. 40.🫗 Which of these is done by winnowing? (a) mud from water (b) bran from wheat flour (c) chaff from wheat grain (d) gravel from fine sand

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