Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 734 · 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 yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the iron setting (c) how dark the writing is
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
5. 5.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) the juice scorches first (c) paper turns lemony (d) the iron is brown
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🧈 What is the watery liquid left after the butter forms? (a) oil (b) honey (c) vinegar (d) buttermilk
8. 8.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
10. 10.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
11. 11.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) it turns to sand (c) it turns to sugar (d) no, salt passes through
12. 12.🧺 Which of these is needed for making butter? (a) cold water to rinse (b) a magnet (c) a balloon (d) turmeric powder
13. 13.True or false: water is not needed for the turmeric test. (a) True (b) False
14. 14.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) eat a few to check (c) throw them at friends (d) feed them to pets
15. 15.🔍 Which is the odd one out? (a) dipping the cotton bud (b) reading the message (c) writing the message (d) plugging in the iron
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) sugar (d) a small bottle
17. 17.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) lemon juice (c) a balloon (d) a small bowl
18. 18.📘 What do we call a seed starting to grow? (a) condensation (b) germination (c) pollination (d) evaporation
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a balloon (c) a battery cell (d) a mirror
21. 21.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
22. 22.🔮 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
23. 23.🧺 Which of these is needed for sprouting seeds? (a) a few days (b) a battery cell (c) a mirror (d) yeast
24. 24.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) browning lemon ink (d) cooking an egg
25. 25.True or false: cutting the lemon is a job for an adult. (a) True (b) False
26. 26.True or false: warm water is needed for growing salt crystals. (a) True (b) False
27. 27.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.True or false: yeast is needed for growing salt crystals. (a) True (b) False
29. 29.True or false: dissolving salt is a change that can be undone. (a) False (b) True
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the size of the plant (c) the same kind of bag (d) amount of water drops
32. 32.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
33. 33.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
34. 34.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) it shrinks (c) it grows bigger (d) there is no change
35. 35.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) vinegar (b) a few hours (c) a potted plant (d) a clear plastic bag
36. 36.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
37. 37.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) cutting the lemon (c) letting the paper dry (d) ironing the paper
40. 40.🧺 Which of these is not needed for making butter? (a) a balloon (b) fresh cream (c) a bowl (d) a timer

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