Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 619 · 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.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
2. 2.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a magnet (c) an empty bottle (d) sugar
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it can block breathing (d) it gets wet
5. 5.🪴 Through which part does a plant take in water from the soil? (a) the flowers (b) the leaves (c) the fruits (d) the roots
6. 6.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) sand and pebbles (c) a balloon (d) a battery cell
7. 7.True or false: curd is an acid. (a) True (b) False
8. 8.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) a tray for spills (c) a battery cell (d) a mirror
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🫧 Which of these is neutral? (a) plain water (b) orange juice (c) curd (d) soap solution
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a funnel or spoon (c) a comb (d) baking soda
14. 14.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
15. 15.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) dissolving salt (d) milk turning to curd
16. 16.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
17. 17.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) make seeds (c) take in water from soil (d) give out water vapour
18. 18.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
21. 21.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) salt water (d) plain water
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) the time we wait (c) the kind of plant (d) sun or shade
23. 23.True or false: dissolving salt is a change that can be undone. (a) True (b) False
24. 24.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) True (b) False
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
26. 26.📘 What do we call plants giving out water vapour from their leaves? (a) digestion (b) germination (c) reflection (d) transpiration
27. 27.True or false: a mirror is needed for the leafy bag test. (a) False (b) True
28. 28.True or false: letting the paper dry is a job for an adult. (a) True (b) False
29. 29.True or false: reading the message is a job for an adult. (a) True (b) False
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) a battery cell
31. 31.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
32. 32.⚖️ 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) False (b) True
33. 33.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
35. 35.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) dissolving salt (d) cooking an egg
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
39. 39.🫗 Is filtered pond water safe to drink? (a) yes, if it is cold (b) no, germs may stay (c) yes, if it is clear (d) yes, always
40. 40.True or false: lemon juice is a base. (a) True (b) False

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