Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 41 · 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: a piece of string is not needed for growing salt crystals. (a) False (b) True
2. 2.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a comb (c) a funnel or spoon (d) vinegar
3. 3.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) a rubber band (c) a potted plant (d) a clear plastic bag
4. 4.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.True or false: a balloon is needed for the muddy water filter. (a) False (b) True
7. 7.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
10. 10.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
11. 11.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) dry yeast (d) turmeric powder
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) False (b) True
13. 13.True or false: wet seeds by a window sprouts in a few days. (a) True (b) False
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🧈 Why does shaking cream make butter? (a) the lid is warm (b) fat bits stick together (c) shaking adds salt (d) the jar adds butter
16. 16.True or false: soil is not needed for a seed to sprout. (a) False (b) True
17. 17.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they turn to stones (c) yes, they sprout (d) they melt
18. 18.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) baking soda (d) small pebbles
19. 19.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a jar with a tight lid (c) cold water to rinse (d) a battery cell
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
22. 22.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
23. 23.True or false: a bowl is needed for making butter. (a) False (b) True
24. 24.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) the same bottle (c) spoons of baking soda (d) the amount of vinegar
26. 26.True or false: a magnet is not needed for making butter. (a) True (b) False
27. 27.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
28. 28.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
29. 29.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) roots (c) flower (d) stem
30. 30.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) yeast (b) lemon juice (c) a cotton bud (d) an adult with an iron
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the liquid we test (c) the light we look in (d) the turmeric paper
32. 32.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
33. 33.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) stomata (c) petals (d) roots
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) the iron setting (c) the kind of juice (d) the same paper
35. 35.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
36. 36.⚖️ 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
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
38. 38.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
39. 39.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) lemon juice (d) plain water

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