The Sun.

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Presentation transcript:

The Sun

The Sun provides heat, light and radiation energy provides energy needed by all plants and animals on Earth to survive its gravitational pull keeps Earth in its orbit estimated to be approximately 5 billion years old it is made up of 75% hydrogen and 25% helium it is estimated that it will be around for another 5 billion years before it runs out of fuel (hydrogen) rotates faster at it equator than at its poles. the dark spots on the Sun are called sunspots (areas of strong magnetic field)

Eg. hydrogen atom + hydrogen atom  helium atom Nuclear Fusion the process by which the Sun produces energy in the core of the Sun, the temperature and pressure is so high that atoms join together to form a new substance Eg. hydrogen atom + hydrogen atom  helium atom the above reaction produces large amounts of energy (heat and light)  this travels across space to the Earth and heats it

Solar Flares an eruption of hot gases from the inner atmosphere (chromosphere) of the Sun they are very quick and last only a few minutes they emit charged particles that can travel to the Earth and auroras can result--> these particles affect us in 2 main ways: http://www.youtube.com/watch?v=HvJfjVdJ79o&feature=related

Solar Flares Solar flares affect us in 2 main ways: produce the beautiful auroras eg. the northern and southern lights cause problems with communication systems in regions near the South and North Poles --> electrical interference caused here due to focusing of the particles by the Earth's magnetic field

Ho Textbook: read 333-339 answer # 4,5,7,8 on page 340 Impact of Solar Flares News http://www.youtube.com/watch?v=cLyMn-Jor1s Largest Solar Flare to Strike Earth http://news.nationalgeographic.com/news/2012/03/120308-solar-flare-storm-sun-space-weather-science-aurora/ Solar Flares to Create History w/ Video http://ngm.nationalgeographic.com/2012/06/solar-storms/ferris-text

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