Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 349 · 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.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a balloon (c) soap solution (d) a dropper or spoon
2. 2.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) never put seeds in mouth (d) eat a few to check
3. 3.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) it is only melting (c) it is only dissolving (d) yes, a new gas forms
4. 4.True or false: salt water is neutral. (a) False (b) True
5. 5.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
6. 6.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
7. 7.True or false: folding paper is a change that cannot be undone. (a) False (b) True
8. 8.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) baking soda water (d) tamarind water
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the kind of balloon (b) size of the balloon (c) spoons of baking soda
10. 10.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
11. 11.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the leaves (c) the rain (d) the plastic
12. 12.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
13. 13.True or false: water is not needed for a seed to sprout. (a) False (b) True
14. 14.🌱 What comes out of a moong seed first when it sprouts? (a) a fruit (b) a tiny root (c) a flower (d) a thorn
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
17. 17.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
18. 18.True or false: detergent water is a base. (a) True (b) False
19. 19.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
20. 20.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) the same place (c) how many seeds sprout
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny insects (c) nothing at all (d) tiny water drops
23. 23.True or false: turmeric powder is not needed for making butter. (a) True (b) False
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) turmeric powder (d) dry yeast
25. 25.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is magnetic (c) it can burn skin (d) it is sticky
26. 26.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
28. 28.🧈 Why does shaking cream make butter? (a) shaking adds salt (b) the jar adds butter (c) fat bits stick together (d) the lid is warm
29. 29.🔍 Which is the odd one out? (a) melting butter (b) browning lemon ink (c) baking a cake (d) rusting iron
30. 30.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rinse with clean water (c) rub it hard (d) add baking soda
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a battery cell (c) white paper (d) a small bowl
32. 32.True or false: turmeric powder is not needed for the secret lemon message. (a) False (b) True
33. 33.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) sugar (c) a battery cell (d) a funnel or spoon
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the light we look in (d) the turmeric paper
35. 35.🪴 Which of these is a job of the flower? (a) make food in sunlight (b) take in water from soil (c) make seeds (d) hold the plant in soil
36. 36.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
37. 37.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
38. 38.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
39. 39.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) yes, they sprout (c) no, never (d) they melt
40. 40.🧺 Do we need a balloon for making butter? (a) needed (b) not needed

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