Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 954 · 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.True or false: a comb is needed for the turmeric test. (a) False (b) True
2. 2.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) the amount of cream (c) time to make butter
3. 3.🧂 Which of these does not dissolve in water? (a) table salt (b) chalk powder (c) glucose powder (d) food colour
4. 4.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) helium (c) hydrogen (d) oxygen
5. 5.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a small bottle (d) a mirror
7. 7.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
8. 8.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
9. 9.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) a magnet (d) an indicator
10. 10.🪴 Which part of a plant does this job: carry water upward? (a) roots (b) stem (c) leaves (d) flower
11. 11.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) vinegar (c) a battery cell (d) a rubber band
12. 12.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) a bowl (c) turmeric powder (d) a timer
13. 13.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
14. 14.True or false: salt is not needed for a seed to sprout. (a) False (b) True
15. 15.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a comb (c) a funnel or spoon (d) vinegar
16. 16.🫗 How do we separate bran from wheat flour? (a) evaporating (b) winnowing (c) sieving (d) filtering
17. 17.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
18. 18.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
19. 19.🧺 Which of these is needed for the muddy water filter? (a) sand and pebbles (b) yeast (c) a battery cell (d) a mirror
20. 20.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) vinegar (c) a potted plant (d) sunlight
21. 21.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) yeast (c) a balloon (d) an adult with an iron
22. 22.True or false: rusting iron is a change that can be undone. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) salt water (b) plain water (c) sugar water (d) baking soda water
24. 24.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the ink is magnetic (c) the paper ate it (d) dry juice is see-through
25. 25.🛟 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) feed them to pets (d) never put seeds in mouth
26. 26.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) sugar (b) warmth (c) sunlight (d) soil
28. 28.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
29. 29.🧂 Which of these dissolves in water? (a) sugar (b) cooking oil (c) sawdust (d) sand
30. 30.True or false: baking soda water is a base. (a) False (b) True
31. 31.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to clean floors (d) to colour rice
32. 32.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it can block breathing (d) it gets wet
33. 33.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the same bottle (c) spoons of baking soda
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
36. 36.True or false: vinegar is a base. (a) False (b) True
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) warm water (d) a piece of string
38. 38.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
39. 39.🔍 Which is the odd one out? (a) a magnet (b) time (c) sugar (d) warm water
40. 40.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) baking soda (d) cooking oil

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