Seasons occur on Earth because the planet is tilted on its axis at just over 23 degrees. Both the Southern Hemisphere and the Northern Hemisphere are tilted closer to the sun as the planet completes a full orbit.Know More
The Earth's tilt means that, as the planet revolves around the sun, first one pole and then the other is closer to the sun. At the most extreme points, parts of one pole are in complete darkness for long periods, while locations at or near the other pole are in perpetual daylight.
If the Earth had no tilt at all and rotated straight up and down on its axis, there would be no seasons as they are currently known. While there would still be an equator and poles, with all parts of the planet remaining the same distance from the sun, the seasons would end. Points close to the equator experience this to an extent. Locations close to the equator tend to have just two seasons: a dry season and a rainy season. Even though they are affected far less by the actual tilt of the planet, the seasons near the equator are still strongly influenced by the weather patterns in other parts of the world.Learn more in Earth Science
The Earth is constantly spinning on its axis, allowing sunlight to shine on different areas of the Earth at different times of the day, creating daytime when the Sun hits a specific area. When the Sun is not shining on a specific area of the Earth, it is nighttime. Since the Sun does not hit all of the Earth at the same time, it is daytime in some parts of the world, while it is nighttime in others.Full Answer >
Droughts can occur anywhere on the planet, but they are most prevalent and long-lasting in arid climates. Areas of the globe that experience high humidity and precipitation can have droughts when rainfall totals taper off over a long period of time, but these droughts are usually temporary in nature.Full Answer >
The Earth is referred to as "the blue planet" because of the abundance of water on the planet. Over 70 percent of the Earth's surface is comprised of water, producing a vivid blue color when viewed from space.Full Answer >
While no one knows for certain how the Earth formed, scientists theorize that it formed over 4 million years ago after the sun went through its initial formation, gravity began to draw heavy particles together into a planet and solar winds blew away lighter gases. These heavy particles became the core of the planet. As the mass continued to grow, heavier particles sank to the center, according to Space.com.Full Answer >