Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 531 · 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 done by handpicking? (a) small stones from dal (b) gravel from fine sand (c) husk from rice grain (d) chaff from wheat grain
2. 2.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they are too wet (c) they have no water (d) they have no salt
3. 3.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
4. 4.⚖️ 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 kind of juice (c) the same paper (d) the iron setting
5. 5.True or false: water is needed for a seed to sprout. (a) True (b) False
6. 6.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) water (c) soap solution (d) white paper strips
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
9. 9.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
10. 10.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is what we measure. (a) False (b) True
11. 11.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) a balloon (c) turmeric powder (d) a few days
12. 12.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same place (b) the same bowls (c) the kind of seeds (d) wet or dry cotton
13. 13.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) rusting iron (d) dissolving salt
14. 14.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) yeast (d) warm water
16. 16.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) time to make butter (c) the amount of cream (d) the cream temperature
18. 18.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) how many seeds sprout (c) the kind of seeds
19. 19.🧺 Which of these is not needed for the leafy bag test? (a) a magnet (b) a clear plastic bag (c) a potted plant (d) a rubber band
20. 20.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.⚖️ 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 measure it (c) we keep it the same
22. 22.🧺 Do we need vinegar for the leafy bag test? (a) not needed (b) needed
23. 23.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
24. 24.🔍 Which is the odd one out? (a) cutting the lemon (b) ironing the paper (c) plugging in the iron (d) letting the paper dry
25. 25.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
26. 26.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns yellow again (d) it turns blue
27. 27.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
28. 28.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) False (b) True
31. 31.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
32. 32.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) skip washing
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) dry yeast (d) a mirror
34. 34.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
35. 35.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
36. 36.🪴 Where did the water inside the bag come from? (a) the leaves (b) the rubber band (c) the plastic (d) the rain
37. 37.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a fruit (c) a tiny root (d) a flower
38. 38.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) seeds in the freezer (d) wet seeds by a window
39. 39.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
40. 40.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children

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