Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 455 · 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 sunlight for the leafy bag test? (a) needed (b) not needed
2. 2.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it grows bigger (c) it turns blue (d) it shrinks
3. 3.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
4. 4.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a balloon (d) a spoon
6. 6.🧺 Do we need a bowl for making butter? (a) not needed (b) needed
7. 7.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a balloon (d) warm water
9. 9.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) vinegar (c) a few hours (d) a rubber band
11. 11.🔮 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
12. 12.True or false: a cotton bud is needed for the secret lemon message. (a) False (b) True
13. 13.True or false: hold the plant in soil is a job of the roots. (a) False (b) True
14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
15. 15.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) an adult with an iron (d) yeast
16. 16.True or false: a seed is needed for the fizzy balloon. (a) False (b) True
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.True or false: cooking an egg is a change that can be undone. (a) True (b) False
21. 21.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
22. 22.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) almost nothing (d) dark brown words
23. 23.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) the amount poured (c) the same funnel (d) how clear the water is
25. 25.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
26. 26.True or false: a bowl is needed for making butter. (a) False (b) True
27. 27.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it can block breathing (d) it changes colour
28. 28.🎈 Why does the balloon blow up? (a) gas is made inside (b) the bottle shrinks (c) vinegar is hot (d) outside air gets in
29. 29.True or false: melting ice is a change that cannot be undone. (a) True (b) False
30. 30.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) a battery cell (c) baking soda (d) a balloon
31. 31.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
32. 32.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) no butter forms (c) more butter forms (d) it turns blue
33. 33.🫧 Which of these is an acid? (a) detergent water (b) salt water (c) vinegar (d) baking soda water
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is kept the same. (a) False (b) True
35. 35.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the ironing time
37. 37.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a magnet (c) sand and pebbles (d) muddy water
39. 39.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) the same jar (c) the cream temperature (d) time to make butter
40. 40.True or false: ironing the paper is a job for an adult. (a) False (b) True

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