Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 5 · 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: yeast is not needed for the muddy water filter. (a) False (b) True
2. 2.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) small pebbles (d) baking soda
3. 3.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) lumps of butter (c) sugar crystals (d) bubbles of gas
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) the size of the plant (c) sun or shade
7. 7.True or false: a magnet is not needed for making butter. (a) True (b) False
8. 8.True or false: carry water upward is a job of the stem. (a) True (b) False
9. 9.🌱 Will these sprout: boiled seeds? (a) does not sprout (b) sprouts
10. 10.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) how hard we shake (b) time to make butter (c) the amount of cream (d) the cream temperature
12. 12.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) heat adds colour (c) the juice scorches first (d) the iron is brown
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) False (b) True
16. 16.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the liquid we test (d) the colour we see
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
19. 19.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
20. 20.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) a funnel (c) muddy water (d) sand and pebbles
21. 21.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
22. 22.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is what we measure. (a) True (b) False
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
24. 24.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
25. 25.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) almost nothing (c) blue words (d) dark brown words
26. 26.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a potted plant (d) a mirror
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
28. 28.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
29. 29.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) no butter forms (c) it turns blue (d) more butter forms
30. 30.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
31. 31.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) salt water
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) False (b) True
33. 33.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
35. 35.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) a small bowl (c) cotton wool (d) turmeric powder
36. 36.True or false: a mirror is needed for the secret lemon message. (a) False (b) True
37. 37.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
38. 38.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it changes colour (d) it can block breathing
40. 40.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) sugar (c) a balloon (d) baking soda

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