Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 357 · 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 of these is not needed for the secret lemon message? (a) an adult with an iron (b) lemon juice (c) a balloon (d) white paper
2. 2.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) paper turns lemony (c) the juice scorches first (d) the iron is brown
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) a piece of string (d) warm water
5. 5.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (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 fizzy balloon. (a) True (b) False
7. 7.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
8. 8.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the number of seeds (b) how many seeds sprout (c) wet or dry cotton
9. 9.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) blue (d) green
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it grows bigger (c) there is no change (d) it turns blue
12. 12.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
13. 13.🫗 How do we separate sugar from sugar water? (a) filtering (b) sieving (c) evaporating (d) winnowing
14. 14.🧈 Why does shaking cream make butter? (a) fat bits stick together (b) the lid is warm (c) shaking adds salt (d) the jar adds butter
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same funnel (c) the same glass (d) the same muddy water
17. 17.True or false: plugging in the iron is a job a child can do. (a) False (b) True
18. 18.True or false: sawdust does not dissolve in water. (a) True (b) False
19. 19.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) a magnet (d) vinegar
20. 20.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a mirror (c) fresh cream (d) a timer
21. 21.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
22. 22.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) the balloon bursts (c) it turns to honey (d) very little fizzing
23. 23.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) butter lumps (c) ghee (d) still runny cream
24. 24.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a funnel or spoon (c) a magnet (d) a mirror
25. 25.📘 What do we call a seed starting to grow? (a) pollination (b) evaporation (c) condensation (d) germination
26. 26.True or false: make food in sunlight is a job of the leaves. (a) False (b) True
27. 27.True or false: yeast is needed for making butter. (a) True (b) False
28. 28.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) clear water (c) powder (d) thick whipped cream
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) soil (b) sunlight (c) salt (d) air
31. 31.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it stays yellow (d) it turns blue
34. 34.True or false: a balloon is not needed for the secret lemon message. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) letting the paper dry (b) cutting the lemon (c) writing the message (d) reading the message
36. 36.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
37. 37.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
38. 38.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a rubber band (c) a few hours (d) yeast
40. 40.⚖️ 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 kind of plant (b) the size of the plant (c) amount of water drops (d) sun or shade

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids