The Earth's revolution occurs in two different ways. The Earth revolves around the sun, and it also revolves, or rotates, on its own axis.
The Earth revolves around the sun at a speed of about 67,100 miles per hour. One whole orbit or revolution around the sun takes approximately 365.25 days, which comes out to a year. The extra 0.25 day is accounted in the extra day on leap years every 4 years.
The Earth's axis is tilted slightly, meaning part of the planet is closer to the sun and part of it is farther away at any given time. The actual distance to the sun also changes throughout the year, from a high of 94,509,130 miles around July 4th to a low of 91,402,505 miles around January 3rd. Because the Earth tilts towards the Southern Hemisphere in January , it means that the Southern Hemisphere gets slightly more solar energy than the Northern Hemisphere over the whole year.
The Earth's rotation around the sun and its tilt also produce the seasonal variations in the weather. As the Northern Hemisphere tilts towards the sun, it experiences the warmer temperatures of summer. At the same time, the Southern Hemisphere is tilted away from the sun and experiences winter.Learn More
Emic and etic are two different ways to research human beings. In the emic approach, the research participants' words and perspectives are the starting point, and it is an insider, or bottom-up, approach. In the etic method theories, concepts and ideas are studied, and it is an outsider, or top-down, approach.Full Answer >
The sun's energy comes from the nuclear fusion reactions that happen within its core. When atoms of hydrogen come together in the core of the sun, they fuse to become another element: helium. This reaction produces energy.Full Answer >
There are several biotic (living) and abiotic (nonliving) factors that are common to all types of desert biomes, or ecosystems, including cacti, fire ants, high daytime temperatures and sand. Biotic factors also include plants and animals such as sagebrush, scorpions, lizards and snakes. Abiotic factors include low temperatures at night, wind, and lack of rainfall.Full Answer >
Although diamond is the strongest naturally occurring substance on Earth, as of 2013, science has developed a new form of carbon called carbyne that surpasses it. Carbyne's ability to withstand stretching surpasses any known substance. Comprised of carbon atoms held together by either alternating single and triple or double atomic bonds, carbyne's tensile strength is almost three times that of diamond.Full Answer >