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.Know More
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 about Earth Science
Mutations affect organisms in two different ways. Genetic mutations are inherited DNA changes that can be passed on to the next generation. Somatic mutations are DNA changes that are acquired after birth. Mutations can be helpful, harmful or make no difference at all.Full Answer >
A low-latitude climate zone is one of the three main climate groups, which occur in areas near the equator and are controlled by tropical air masses. There are three major types of low latitude climates: tropical moist climates, wet-dry tropical climates and dry tropical climates.Full Answer >
A climate graph is a type of chart that uses both line and bar graphs to compare temperature and precipitation in a given geographic region over a specific period of time. In all climate graphs, the date range is represented by numbers at the bottom of the chart. The dates can include any period of time, though longer spans, such as months or years, are the most common.Full Answer >
Ocean water is salty primarily due to the large amounts of chloride and sodium on land which are dissolved by rainfall and carried to the sea by rivers and streams. Hydrothermal vents and underwater volcanoes located on the seabed also contribute dissolved salts to the ocean.Full Answer >