How do movements and interactions of air masses cause change in the weather?

At a cold front, air can be forced upward quickly. Within an air mass, uneven heating can produce convection and thunderstorms. Thunderstorms get their energy from humid air. When warm, humid air near the ground moves vertically into cooler air above, the rising air, or updraft, can build a thunderstorm quickly.

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.