Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 4 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
2. 2.True or false: soap solution is needed for the turmeric test. (a) True (b) False
3. 3.🌱 Is air needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same muddy water (b) how clear the water is (c) the filter material
8. 8.True or false: a potted plant is not needed for the leafy bag test. (a) False (b) True
9. 9.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it shrinks (c) it turns blue (d) there is no change
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
12. 12.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns blue (d) it turns darker red
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) sunlight (c) soil (d) air
15. 15.True or false: bran from wheat flour is done by filtering. (a) False (b) True
16. 16.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🧺 Which of these is needed for making butter? (a) a magnet (b) turmeric powder (c) a battery cell (d) fresh cream
19. 19.🧺 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 clear plastic bag (d) a battery cell
20. 20.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
21. 21.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) plugging in the iron (c) letting the paper dry (d) ironing the paper
24. 24.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed
25. 25.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
26. 26.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
27. 27.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it is too big (c) it gets wet (d) it changes colour
28. 28.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is the one thing we change. (a) True (b) False
29. 29.True or false: cooking oil does not dissolve in water. (a) False (b) True
30. 30.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) with a hot glue gun (d) gently, not too tight
31. 31.🪴 Which of these is a job of the stem? (a) carry water upward (b) make seeds (c) take in water from soil (d) make food in sunlight
32. 32.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) nothing at all (c) tiny water drops (d) tiny insects
33. 33.True or false: ironing the paper is a job a child can do. (a) True (b) False
34. 34.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a mirror (c) yeast (d) a magnet
35. 35.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) sand and pebbles (c) a funnel (d) a clean glass
36. 36.🫗 Which of these is done by handpicking? (a) small stones from dal (b) gravel from fine sand (c) salt from sea water (d) husk from rice grain
37. 37.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) clearer (c) salty (d) hot
38. 38.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) only an adult (d) the youngest child
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) sugar (c) a balloon (d) a tray for spills

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