Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 302 · 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 cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the amount of cream (c) the cream temperature
2. 2.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) turmeric powder (c) a magnet (d) sand and pebbles
3. 3.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
4. 4.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) clearer (d) muddier
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a battery cell (d) salt
6. 6.🔍 Which is the odd one out? (a) reading the message (b) letting the paper dry (c) putting the iron away (d) dipping the cotton bud
7. 7.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) False (b) True
9. 9.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
10. 10.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) time to make butter (b) the amount of cream (c) the cream temperature (d) the same jar
12. 12.🫗 Which of these is done by sieving? (a) small stones from dal (b) mud from water (c) sugar from sugar water (d) gravel from fine sand
13. 13.True or false: a rubber band is not needed for the leafy bag test. (a) True (b) False
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
15. 15.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) an adult with an iron (c) turmeric powder (d) a small bowl
16. 16.🧺 Which of these is not needed for making butter? (a) fresh cream (b) yeast (c) cold water to rinse (d) a jar with a tight lid
17. 17.🧂 Which of these does not dissolve in water? (a) food colour (b) sawdust (c) glucose powder (d) table salt
18. 18.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it can block breathing (c) it gets wet (d) it changes colour
19. 19.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) shake it near your face (d) seal it in a glass jar
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it shrinks (c) it turns blue (d) there is no change
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) True (b) False
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is what we measure. (a) False (b) True
24. 24.True or false: seeds on wet cotton does not sprout. (a) True (b) False
25. 25.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) sunlight (d) a magnet
26. 26.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
27. 27.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) yeast (d) white paper strips
28. 28.🫧 Which of these is an acid? (a) vinegar (b) salt water (c) soap solution (d) plain water
29. 29.🧺 Which of these is needed for making butter? (a) a magnet (b) a balloon (c) a battery cell (d) a timer
30. 30.True or false: a balloon is not needed for the secret lemon message. (a) True (b) False
31. 31.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is cold (c) yes, if it is clear (d) no, germs may stay
32. 32.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
33. 33.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
34. 34.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
35. 35.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) oxygen (c) hydrogen (d) helium
36. 36.🔍 Which is the odd one out? (a) ironing the paper (b) cutting the lemon (c) letting the paper dry (d) plugging in the iron
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it

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