Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 668 · 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.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
4. 4.True or false: writing the message is a job for an adult. (a) True (b) False
5. 5.🫧 Which of these is neutral? (a) detergent water (b) baking soda water (c) curd (d) plain water
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) chemical (d) musical
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
10. 10.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
11. 11.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
12. 12.True or false: time is something yeast does not need. (a) True (b) False
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the kind of juice (c) the iron setting (d) the same paper
14. 14.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) blue (d) white
15. 15.True or false: sugar is needed for the yeast balloon. (a) True (b) False
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) baking soda (c) a battery cell (d) a tray for spills
17. 17.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it can burn skin (c) it is cold (d) it is magnetic
18. 18.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it gets hot (c) so it turns yellow (d) so cream does not spill
19. 19.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
20. 20.🔍 Which is the odd one out? (a) letting the paper dry (b) ironing the paper (c) dipping the cotton bud (d) writing the message
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
22. 22.🎈 Why does the balloon blow up? (a) outside air gets in (b) the bottle shrinks (c) vinegar is hot (d) gas is made inside
23. 23.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
24. 24.True or false: a balloon is not needed for sprouting seeds. (a) True (b) False
25. 25.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
26. 26.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
27. 27.True or false: water is not needed for sprouting seeds. (a) True (b) False
28. 28.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
29. 29.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) very little fizzing (c) a huge eruption (d) the balloon bursts
30. 30.🫧 Which of these is an acid? (a) soap solution (b) vinegar (c) plain water (d) baking soda water
31. 31.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
32. 32.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, if shaken (d) yes, in the dark
33. 33.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a magnet (c) turmeric powder (d) a small bowl
34. 34.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
35. 35.⚖️ 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
36. 36.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) ironing the paper (c) cutting the lemon (d) letting the paper dry
37. 37.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they do not sprout (c) they glow (d) they grow fruit
38. 38.🔍 Which is the odd one out? (a) time (b) sugar (c) salt (d) warm water
39. 39.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the number of drops (c) the turmeric paper (d) the colour we see

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