<u>Answer</u>: B.The heliocentric model shows that Earth revolves around the Sun. The geocentric model shows that the Sun revolves around Earth.
The geocentric model is also known as the Ptolemaic model and had as center of the Universe Earth. However, the heliocentric model presented by Nicolaus Copernicus and Galileo Galilei, had the sun as the center of the Solar System, with Earth orbiting around it. However, it is thought that this theory was older than Copernicus.
Answer:
The most important reason for learning about environmental systems is due to the fact that we should know what's going on in the world around us. If we were to travel to Asia, we should know the forests that lie there to pack appropriately. It's also important to just be aware of how the world works. It's also good to know what rock type you'll be walking on, so you can pack shoes accordingly. Overall, it's better to know the world around you than to live in ignorance.
Uring this period he became acquainted with Osama bin Laden, a wealthy Saudi who had joined the Afghan resistance to the Soviets,
Hydrogen is more frequently bonded with Carbon.
