Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 366 · 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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a rubber band (c) a mirror (d) a clear plastic bag
3. 3.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
4. 4.🌱 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
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the time we wait (b) amount of water drops (c) sun or shade (d) the size of the plant
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) sun or shade (b) amount of water drops (c) the same kind of bag
7. 7.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
8. 8.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) ignore it (c) rinse with clean water (d) rub it hard
9. 9.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) small pebbles (d) food colour
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the ironing time (b) the iron setting (c) how dark the writing is (d) the same paper
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.🧺 Which of these is not needed for making butter? (a) a bowl (b) a magnet (c) a jar with a tight lid (d) fresh cream
14. 14.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) salt (d) a magnet
15. 15.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) rub your eyes (c) wash your hands (d) lick your fingers
16. 16.🌱 Will these sprout: seeds on wet cotton? (a) does not sprout (b) sprouts
17. 17.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
18. 18.🔍 Which is the odd one out? (a) salt (b) warm water (c) time (d) sugar
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) melting butter (d) cooking an egg
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.True or false: make seeds is a job of the flower. (a) True (b) False
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
24. 24.🧺 Which of these is not needed for the fizzy balloon? (a) a seed (b) baking soda (c) a balloon (d) vinegar
25. 25.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
26. 26.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) salt (d) a balloon
27. 27.⚖️ 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 keep it the same (b) we change it (c) we measure it
28. 28.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns yellow again (d) it turns blue
29. 29.⚖️ 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
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) warm water (c) a balloon (d) dry yeast
32. 32.🫗 How do we separate chaff from wheat grain? (a) filtering (b) winnowing (c) evaporating (d) sieving
33. 33.🌱 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 on dry cotton
34. 34.True or false: a funnel or spoon is not needed for the fizzy balloon. (a) False (b) True
35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
36. 36.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
37. 37.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a balloon (c) an adult with an iron (d) a cotton bud
38. 38.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) sand and pebbles (c) a balloon (d) turmeric powder
39. 39.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) writing the message (c) cutting the lemon (d) putting the iron away
40. 40.🔍 Which is the odd one out? (a) putting the iron away (b) cutting the lemon (c) reading the message (d) ironing the paper

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