Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 449 · 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.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it turns blue (c) there is no change (d) it shrinks
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
4. 4.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) cooking an egg (d) dissolving salt
5. 5.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
6. 6.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
7. 7.True or false: dipping the cotton bud is a job a child can do. (a) False (b) True
8. 8.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) salt water (d) vinegar
9. 9.⚖️ 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) size of the balloon (c) spoons of baking soda (d) the kind of balloon
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) the iron setting (c) the kind of juice (d) the same cotton bud
11. 11.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
12. 12.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a magnet (c) a balloon (d) a small bottle
14. 14.🧺 Which of these is needed for making butter? (a) a battery cell (b) a magnet (c) cold water to rinse (d) turmeric powder
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) False (b) True
16. 16.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) chemical (d) physical
17. 17.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
18. 18.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
19. 19.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
20. 20.📘 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
21. 21.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
22. 22.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
23. 23.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) dark green (c) bright red (d) blue
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
25. 25.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
28. 28.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
29. 29.🧺 Which of these is not needed for sprouting seeds? (a) a battery cell (b) moong seeds (c) a small bowl (d) water
30. 30.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
31. 31.🔍 Which is the odd one out? (a) warmth (b) air (c) water (d) soil
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.True or false: sugar is not needed for a seed to sprout. (a) False (b) True
34. 34.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
35. 35.🧺 Which of these is needed for the turmeric test? (a) water (b) a balloon (c) yeast (d) a battery cell
36. 36.🔍 Which is the odd one out? (a) letting the paper dry (b) reading the message (c) writing the message (d) plugging in the iron
37. 37.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a potted plant (c) a magnet (d) sunlight
39. 39.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
40. 40.True or false: a clear plastic bag is not needed for the leafy bag test. (a) True (b) False

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