Chapter 11. The Sun average-sized star. 300 000 times more mass than Earth The sun’s mass...

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Chapter 11

Transcript of Chapter 11. The Sun average-sized star. 300 000 times more mass than Earth The sun’s mass...

Page 1: Chapter 11. The Sun  average-sized star.  300 000 times more mass than Earth  The sun’s mass results in great pressure and heat at the centre of the.

Chapter 11

Page 2: Chapter 11. The Sun  average-sized star.  300 000 times more mass than Earth  The sun’s mass results in great pressure and heat at the centre of the.

The Sun

average-sized star. 300 000 times more mass than Earth The sun’s mass results in great

pressure and heat at the centre of the Sun cause a thermonuclear reaction

Hydrogen is converted to helium it has enough hydrogen to last another 5

billion years.

Page 3: Chapter 11. The Sun  average-sized star.  300 000 times more mass than Earth  The sun’s mass results in great pressure and heat at the centre of the.

The Sun

contains more than 99 percent of all the mass in the solar system

The tremendous radiated energy that is produced keeps Earth warm enough to support life

Page 4: Chapter 11. The Sun  average-sized star.  300 000 times more mass than Earth  The sun’s mass results in great pressure and heat at the centre of the.

The Sun Sunspots dark patches on the Sun’s

surface that are slightly cooler, about 3500°C, than surrounding areas

Occasionally, extremely violent eruptions of gas called solar flares also occur. These eruptions can last for a few hours and heat gases to 11 000 000°C.

Page 5: Chapter 11. The Sun  average-sized star.  300 000 times more mass than Earth  The sun’s mass results in great pressure and heat at the centre of the.

The Sun

Sun spots and solar flares are associated with Solar wind .

Exposure to solar wind could be fatal for any organism living on Earth.

Earth’s magnetic field deflects most of the solar wind around the planet

Page 6: Chapter 11. The Sun  average-sized star.  300 000 times more mass than Earth  The sun’s mass results in great pressure and heat at the centre of the.

The Sun Some of the high-energy particles in solar

wind enter Earth’s atmosphere at the North and South Poles, where they collide with gases in the atmosphere.

aurora borealis and aurora australisNorthern and Southern Lights

Page 7: Chapter 11. The Sun  average-sized star.  300 000 times more mass than Earth  The sun’s mass results in great pressure and heat at the centre of the.

The Sun

Page 8: Chapter 11. The Sun  average-sized star.  300 000 times more mass than Earth  The sun’s mass results in great pressure and heat at the centre of the.

Questions

1-3 , 5 -7, 11 page 397