If you compress geologic time into a single year, how much time has elapsed since columbus arrived in the new world?

3.6 seconds

Explanation: Geologic time is a way of measuring time based on events in the history of the Earth. If we compress this into one year, a single geologic year equals 4.6 billion years because the planet  was formed 4.6 billion years ago.  

Columbus arrived in the New World in August 1492, 528 years ago.

If 4.6 billion years = 1 year in geologic time,

528 years = 528 X  

=3.6 seconds

(I broke the year down into seconds by breaking it down into days, then hours, minutes and seconds because the value is very small)

So, if we compress geologic time into a single year, only 3.6 seconds have elapsed since Columbus arrived in the New World

the wrong statement is - c. a desert had more biodiversity than a marsh.

the deserts are one of the places of the planet where there's the least biodiversity. the reasons for that are the climate and the lack of food sources, which hampers both the number of the species that can survive in it, and the number of the individuals in the species itself.

the marshes, on the other hand, are places where there's perfect conditions for lots of organisms to thrive. the temperature is moderate and nice, the amount of water and the food sources are on a high level, so there's an abundance of both plant and animal life in them.

the thirteen colonies are:

connecticut, delaware, georgia, maryland, massachusetts, new jersey, new york, new hampshire, north carolina, pennsylvania, rhode island, south carolina, virginia