Answer: Both are chemical changes.
Explanation:
Tarnish can be defined as the product of the chemical reaction that occurs between a metal and a no-metal. The metal which is exposed to the moisture or get oxidized develop a thin layer called tarnish. Copper, silver, brass, magnesium and other metals get tarnished.
The polish removes the chemical product of tarnishing and keeps the silver in silver spoon intact. This involves the chemical reaction.
Salt and vinegar are the ingredients of the chemical formulation which can remove the chemical product of the tarnishing from penny. This involves the chemical reaction.
Both polish and silver and vinegar can bring a chemical changes in the metal without introducing the physical change as they do not affect the physical structure of the metal.
The writer is expressing that people are already happy, but are always looking for more "happines", whether it be new challenges, new experiences, journeys, stuff they learn, things they want to buy but don't really need. People are always looking for new ways to feel like they have achieved something, or always looking for the approval of society.
In contrast to professional journalists, ordinary people report and spread news under the umbrella of citizen journalism.
In contrast to professional journalists, citizen journalism refers to news reporting by members of the general public. Discover what citizen journalism is and look at some examples of how the public spreads the word in different ways.
Citizen journalism, according to specialists in the field, is the gathering and reporting of news via social media, open forums, and established news venues, whether from non-traditional sources or the general population. If they were to provide information about an incident, for instance, police officers or city clerks may act as citizen journalism. With the use of cellphones rising, citizen journalism has grown more and more widespread. Nevertheless, there is evidence of citizen journalism dating back to 1963.
Learn more about citizen journalism here
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Answer:
Nancy never knew nothing about knotts
