Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 617 · 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.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
2. 2.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it shrinks (c) there is no change (d) it turns blue
3. 3.True or false: make food in sunlight is a job of the leaves. (a) True (b) False
4. 4.True or false: a mirror is not needed for the secret lemon message. (a) False (b) True
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
6. 6.True or false: a small bowl is needed for the secret lemon message. (a) False (b) True
7. 7.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) a tray for spills (c) a mirror (d) sugar
8. 8.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
9. 9.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) time (d) warm water
10. 10.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing stays faint (c) writing turns green (d) the paper floats
11. 11.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to make it sweet (d) to colour it
12. 12.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
13. 13.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) curd
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a shallow dish (d) a spoon
15. 15.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
16. 16.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
17. 17.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) dark brown words (c) almost nothing (d) blue words
18. 18.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) no, salt passes through (c) it turns to sand (d) it turns to sugar
19. 19.True or false: sand and pebbles is not needed for the muddy water filter. (a) True (b) False
20. 20.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap water is a base (d) soap is an acid
21. 21.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
24. 24.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wipe hands on face (d) wash hands afterwards
25. 25.🔍 Which is the odd one out? (a) letting the paper dry (b) writing the message (c) dipping the cotton bud (d) cutting the lemon
26. 26.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
27. 27.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a magnet (c) turmeric powder (d) a cotton bud
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
29. 29.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
30. 30.True or false: a funnel or spoon is needed for the fizzy balloon. (a) True (b) False
31. 31.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) sunlight (d) salt
32. 32.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) it turns blue (c) no butter forms (d) it turns to cheese
33. 33.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) exactly the same (c) it fills with soil (d) much less water
34. 34.🧺 Do we need a balloon for the muddy water filter? (a) not needed (b) needed
35. 35.True or false: lemon juice is neutral. (a) True (b) False
36. 36.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the water (c) the salt (d) nothing
37. 37.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they do not sprout (b) they grow fruit (c) they glow (d) they sprout faster
38. 38.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) soap solution (c) a magnet (d) lemon juice
39. 39.True or false: tamarind water is neutral. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) dipping the cotton bud (b) plugging in the iron (c) ironing the paper (d) putting the iron away

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