Question

(2) Which activity would you do to prove that the temperature of a substance must reach
the combustion point of that substance in order to ignite it?
(3) How is petroleum made up ?
(4) Collect information and make a note on how food is preserved in your home.
(5) Make a note on which microorganisms are used in your home to make different dishes?​

Answer 1

Answer:

2) A substance should reach the combustion point of that substance to ignite it.

3) Petroleum is a fossil fuel, meaning that it has been created by the decomposition of organic matter over millions of years.

4) • Food Drying.

• Canning: Water Bath.

• Canning: Pressure Canning.

• Freezing.

• Cool temperature storage.

5) Nature uses microorganisms to carry out fermentation processes, and for thousands of years mankind has used yeasts, moulds and bacteria to make food products such as bread, beer, wine, vinegar, yoghurt and cheese, as well as fermented fish, meat and vegetables.