Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 39 · 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.🧺 Do we need a mirror for the fizzy balloon? (a) needed (b) not needed
2. 2.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
3. 3.True or false: tamarind water is neutral. (a) False (b) True
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
5. 5.True or false: sand does not dissolve in water. (a) True (b) False
6. 6.🧺 Which of these is needed for the secret lemon message? (a) a small bowl (b) turmeric powder (c) a balloon (d) a mirror
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is kept the same. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) plain water
9. 9.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) an indicator (d) a pulley
10. 10.⚖️ 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
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the kind of salt (b) sunny or shady place (c) the same dish (d) the amount of water
12. 12.True or false: seeds in the freezer does not sprout. (a) False (b) True
13. 13.🫗 How do we separate bad grains from rice? (a) winnowing (b) filtering (c) handpicking (d) evaporating
14. 14.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
15. 15.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
16. 16.True or false: a comb is not needed for the turmeric test. (a) False (b) True
17. 17.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing stays faint (c) writing turns green (d) the paper floats
18. 18.True or false: husk from rice grain is done by evaporating. (a) False (b) True
19. 19.True or false: food colour dissolves in water. (a) True (b) False
20. 20.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it floats on top (c) it dissolves (d) it sinks to the bottom
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a small bottle (d) a battery cell
22. 22.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
24. 24.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
25. 25.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
26. 26.True or false: a potted plant is needed for the leafy bag test. (a) True (b) False
27. 27.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
28. 28.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
29. 29.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) baking soda (c) vinegar (d) a battery cell
30. 30.🔍 Which is the odd one out? (a) freezing water (b) cooking an egg (c) dissolving salt (d) melting butter
31. 31.True or false: a magnet is needed for the muddy water filter. (a) False (b) True
32. 32.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so air gets out (c) so cream does not spill (d) so it gets hot
33. 33.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the kind of plant (c) the time we wait (d) the size of the plant
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a magnet (d) a piece of string
36. 36.🧺 Which of these is not needed for the leafy bag test? (a) a battery cell (b) a rubber band (c) a few hours (d) a clear plastic bag
37. 37.🍋 Which of these steps is a job for an adult? (a) reading the message (b) putting the iron away (c) dipping the cotton bud (d) writing the message
38. 38.True or false: warm water is something yeast does not need. (a) False (b) True
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) False (b) True
40. 40.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) glucose powder (d) sand

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