Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 718 · 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.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) lick your fingers (d) rub your eyes
2. 2.⚖️ 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
3. 3.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed
5. 5.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so cream does not spill (c) so air gets out (d) so it gets hot
6. 6.True or false: small stones from dal is done by handpicking. (a) False (b) True
7. 7.True or false: a balloon is not needed for making butter. (a) True (b) False
8. 8.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a funnel (c) muddy water (d) a battery cell
9. 9.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
10. 10.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) almost nothing (d) a rainbow
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is what we measure. (a) False (b) True
12. 12.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a piece of string (d) a balloon
13. 13.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it gets wet (c) it is too big (d) it changes colour
14. 14.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) False (b) True
15. 15.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same place (b) the kind of seeds (c) how many seeds sprout (d) the number of seeds
16. 16.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
17. 17.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
18. 18.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) turmeric powder (c) a few hours (d) a potted plant
20. 20.⚖️ 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
21. 21.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same paper (b) the same cotton bud (c) the kind of juice (d) how dark the writing is
23. 23.🧺 Do we need yeast for the leafy bag test? (a) needed (b) not needed
24. 24.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) dissolving salt (d) cooking an egg
25. 25.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) physical (c) musical (d) chemical
26. 26.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a few hours (c) a rubber band (d) a magnet
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same muddy water
28. 28.🔍 Which is the odd one out? (a) reading the message (b) cutting the lemon (c) writing the message (d) dipping the cotton bud
29. 29.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
31. 31.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
32. 32.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) sand (d) table salt
33. 33.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) sunlight (c) vinegar (d) a potted plant
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a balloon (d) a magnet
36. 36.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
37. 37.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
38. 38.🧺 Do we need a timer for making butter? (a) needed (b) not needed
39. 39.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
40. 40.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed

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