Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 227 · 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: sugar water keeps turmeric yellow. (a) False (b) True
2. 2.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) milk turning to curd (d) freezing water
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a balloon (d) a shallow dish
5. 5.📘 What do we call a seed starting to grow? (a) pollination (b) germination (c) evaporation (d) condensation
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) False (b) True
8. 8.🍋 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
9. 9.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) wet seeds in the dark (d) seeds in the freezer
10. 10.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
11. 11.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
14. 14.True or false: a magnet is not needed for sprouting seeds. (a) False (b) True
15. 15.🧺 Do we need a tray for spills for the fizzy balloon? (a) not needed (b) needed
16. 16.True or false: seeds on wet cotton does not sprout. (a) True (b) False
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
18. 18.⚖️ 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 water (b) the water temperature (c) size of the balloon
19. 19.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it turns to sand (c) it dissolves (d) it sinks to the bottom
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.True or false: salt is needed for a seed to sprout. (a) False (b) True
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) salt (d) a spoon
23. 23.🧈 Before the butter appears, what does the cream turn into? (a) powder (b) ice (c) thick whipped cream (d) clear water
24. 24.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) dissolving salt (d) baking a cake
25. 25.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
26. 26.True or false: time is something yeast does not need. (a) False (b) True
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
28. 28.⚖️ 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
29. 29.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) curd
30. 30.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
31. 31.True or false: moong seeds is needed for sprouting seeds. (a) False (b) True
32. 32.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a mirror (c) lemon juice (d) an adult with an iron
33. 33.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🧺 Do we need a balloon for the muddy water filter? (a) needed (b) not needed
35. 35.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) True (b) False
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the amount of vinegar (c) spoons of baking soda
37. 37.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a funnel or spoon (c) vinegar (d) a seed
38. 38.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) almost nothing (b) blue words (c) dark brown words (d) a rainbow
39. 39.🧺 Do we need yeast for the muddy water filter? (a) not needed (b) needed
40. 40.🧺 Do we need a battery cell for the fizzy balloon? (a) not needed (b) needed

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