Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 80 · 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 a plant in the sun give out more water than one in the shade? True or false: the size of the plant is what we measure. (a) True (b) False
2. 2.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a tiny living fungus (d) a kind of stone
3. 3.🔮 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
4. 4.True or false: sand dissolves in water. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) sugar water (d) baking soda water
6. 6.🔍 Which is the odd one out? (a) milk turning to curd (b) rusting iron (c) dissolving salt (d) cooking an egg
7. 7.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) True (b) False
9. 9.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a magnet (c) moong seeds (d) a small bowl
10. 10.🛟 Why must children keep their fingers away from the iron? (a) it can burn skin (b) it is cold (c) it is sticky (d) it is magnetic
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.True or false: tea leaves from tea is done by filtering. (a) True (b) False
14. 14.True or false: rusting iron is a change that can be undone. (a) False (b) True
15. 15.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no soil (c) they have no water (d) they have no salt
16. 16.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) chalk powder (d) food colour
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) chalk powder (d) sand
19. 19.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) muddy water (c) a mirror (d) sand and pebbles
20. 20.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) a small bottle (d) a balloon
22. 22.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) False (b) True
25. 25.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
26. 26.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) almost nothing (c) blue words (d) dark brown words
27. 27.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) throw them at friends (c) never put seeds in mouth (d) feed them to pets
28. 28.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
29. 29.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) it fills with soil (c) much less water (d) much more water
30. 30.🌱 Which of these is needed for a seed to sprout? (a) soil (b) air (c) sugar (d) salt
31. 31.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a battery cell (c) a tray for spills (d) a seed
32. 32.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) brown (c) white (d) green
35. 35.🔍 Which is the odd one out? (a) letting the paper dry (b) ironing the paper (c) writing the message (d) reading the message
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the liquid we test (d) the number of drops
37. 37.🫗 Which of these is done by handpicking? (a) bran from wheat flour (b) chaff from wheat grain (c) small stones from dal (d) sugar from sugar water
38. 38.True or false: baking soda water is neutral. (a) False (b) True
39. 39.🎈 Why does the balloon blow up? (a) outside air gets in (b) gas is made inside (c) vinegar is hot (d) the bottle shrinks
40. 40.True or false: cooking an egg is a change that can be undone. (a) True (b) False

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