Answer these questions: (3 to 8 paragraphs for each question)
assignment instructions: prepare a 4-10-page essay answering the questions below.
4. what could dark matter be made of?

The universe is comprised of more than 75% of materials that are not visible and are often considered to be the dark matter. These are the baryonic matter that is formed due to the accumulation of protons, neutrons as well as electrons. They can be baryonic or non-baryonic type of matter. These dark matters are the substance that interconnects mostly by gravity along with some visible matter such as the stars and planets. These matters do not reflect light and they attract other matters, forming the major mass of the entire universe.

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.