Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 402 · 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 mirror for the secret lemon message? (a) not needed (b) needed
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the kind of salt (d) the same dish
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.True or false: an empty bottle is not needed for the fizzy balloon. (a) False (b) True
6. 6.🍋 Which of these steps is a job for an adult? (a) writing the message (b) reading the message (c) cutting the lemon (d) dipping the cotton bud
7. 7.True or false: muddy water is needed for the muddy water filter. (a) True (b) False
8. 8.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it wilts and droops (d) it grows faster
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.True or false: yeast is needed for growing salt crystals. (a) False (b) True
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the amount poured (b) the same funnel (c) how clear the water is (d) the same muddy water
12. 12.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
13. 13.🌱 Is sugar needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
14. 14.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) warm water (d) a spoon
16. 16.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) turmeric powder (c) a small bowl (d) a cotton bud
17. 17.True or false: hold up the leaves is a job of the flower. (a) False (b) True
18. 18.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they float apart (c) they freeze (d) they react
19. 19.True or false: chalk powder dissolves in water. (a) True (b) False
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) water (c) a magnet (d) a small bowl
22. 22.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) a magnet (d) an indicator
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a cotton bud (c) lemon juice (d) a balloon
24. 24.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) skip washing (c) rub your eyes (d) lick your fingers
25. 25.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
26. 26.True or false: sunlight is not needed for the leafy bag test. (a) False (b) True
27. 27.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the same bottle (c) size of the balloon
28. 28.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if shaken (c) yes, in the dark (d) yes, if cooled
29. 29.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a potted plant (c) sunlight (d) vinegar
30. 30.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) chalk powder (d) baking soda
31. 31.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) muddier (c) hot (d) clearer
32. 32.📘 What do we call a seed starting to grow? (a) pollination (b) germination (c) condensation (d) evaporation
33. 33.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a potted plant (c) a clear plastic bag (d) yeast
34. 34.True or false: sugar is something yeast does not need. (a) True (b) False
35. 35.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
36. 36.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) lemon juice (c) detergent water (d) soap solution
37. 37.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it can block breathing (d) it gets wet
38. 38.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a balloon (c) a comb (d) a funnel or spoon
39. 39.🧺 Do we need turmeric powder for the secret lemon message? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a mirror (d) dry yeast

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