Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 939 · 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.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) small pebbles (d) baking soda
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
3. 3.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) they turn to stones (c) no, never (d) they melt
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) an empty bottle (c) a tray for spills (d) sugar
5. 5.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) nothing at all (c) salt crystals (d) tiny insects
6. 6.True or false: a balloon is needed for sprouting seeds. (a) False (b) True
7. 7.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
8. 8.🍋 Which of these steps is a job for an adult? (a) writing the message (b) dipping the cotton bud (c) reading the message (d) cutting the lemon
9. 9.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rinse with clean water (c) ignore it (d) rub it hard
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the turmeric paper (d) the liquid we test
11. 11.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
12. 12.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) a cotton bud (c) a small bowl (d) a mirror
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) baking soda (c) a tray for spills (d) an empty bottle
14. 14.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) sunlight (c) a mirror (d) a clear plastic bag
15. 15.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is kept the same. (a) False (b) True
16. 16.True or false: a jar with a tight lid is not needed for making butter. (a) False (b) True
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
18. 18.🔮 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 shrinks (d) it grows bigger
19. 19.🪴 Which of these is a job of the flower? (a) hold up the leaves (b) make seeds (c) hold the plant in soil (d) make food in sunlight
20. 20.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
21. 21.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
23. 23.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) sand and pebbles (c) a magnet (d) a funnel
25. 25.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) orange juice (b) detergent water (c) tamarind water (d) curd
27. 27.⚖️ 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) False (b) True
28. 28.True or false: warm water is something yeast needs. (a) True (b) False
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) True (b) False
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the amount poured (c) the filter material
31. 31.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) fresh cream (c) a bowl (d) turmeric powder
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is what we measure. (a) True (b) False
35. 35.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) the paper ate it (c) it turned into air (d) dry juice is see-through
36. 36.🪴 Which part of a plant does this job: make seeds? (a) leaves (b) stem (c) flower (d) roots
37. 37.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
38. 38.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) True (b) False
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False

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