1. What are three examples of evidence that suggest that some continents were once joined and have since separated?

Fossils of the same species of land mammals have been found on separate land masses.  Coal fields in the Americas and Europe share many similarities and it is highly possible that they were once connected to form a large coal field.

Explanation:

The way that Africa and South America line up is to puzzle piece like to be a conicidence. Also the fact that multiple animals are on different continents naturally, and can live in both climate. Also different continents have fossils from same species suggesting that the once lived in both places.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.