Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 645 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) turmeric powder (d) yeast
2. 2.🍋 Which of these steps is a job for an adult? (a) writing the message (b) letting the paper dry (c) putting the iron away (d) dipping the cotton bud
3. 3.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) cotton wool (c) water (d) yeast
4. 4.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) sugar water (d) lemon juice
5. 5.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the light we look in (d) the colour we see
8. 8.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a clean glass (c) a battery cell (d) yeast
9. 9.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
10. 10.🔍 Which is the odd one out? (a) warmth (b) water (c) sunlight (d) air
11. 11.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) sugar (c) a magnet (d) an empty bottle
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🌱 Is soil needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
14. 14.True or false: fresh cream is needed for making butter. (a) True (b) False
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
16. 16.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) table salt (d) sand
17. 17.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) salt crystals (c) nothing at all (d) tiny insects
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) sugar (b) an empty bottle (c) baking soda (d) a tray for spills
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) the kind of balloon (c) spoons of baking soda (d) size of the balloon
21. 21.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
22. 22.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
24. 24.True or false: sugar dissolves in water. (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.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
27. 27.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is magnetic (c) it can burn skin (d) it is cold
28. 28.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) the iron setting (c) how dark the writing is (d) the same paper
30. 30.🪴 Which part of a plant does this job: make food in sunlight? (a) leaves (b) stem (c) flower (d) roots
31. 31.True or false: cotton or cloth is not needed for the muddy water filter. (a) False (b) True
32. 32.🧺 Do we need a timer for making butter? (a) not needed (b) needed
33. 33.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they glow (b) they grow fruit (c) they do not sprout (d) they sprout faster
34. 34.🔍 Which is the odd one out? (a) dissolving salt (b) freezing water (c) cooking an egg (d) melting ice
35. 35.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) eat a few to check (d) never put seeds in mouth
36. 36.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) nothing (c) the mud (d) the salt
37. 37.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a potted plant (c) a clear plastic bag (d) a battery cell
38. 38.True or false: tamarind water is neutral. (a) False (b) True
39. 39.True or false: salt is needed for a seed to sprout. (a) True (b) False
40. 40.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) muddy water (c) yeast (d) a funnel

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