Northern LightsNorthern Lights

Helen, LynnHelen, Lynn

Nature’s own fireworks.Nature’s own fireworks.

• If you are outdoors one evening during the If you are outdoors one evening during the winter, look up at the skies. If you're lucky winter, look up at the skies. If you're lucky you might see some flashing lights. They look you might see some flashing lights. They look like they are dancing across the dark sky. You like they are dancing across the dark sky. You are watching the northern lights, a natural are watching the northern lights, a natural movie that people watch many years.movie that people watch many years.

What are Northern Lights?What are Northern Lights?

• Northern lights areNorthern lights are the name of lightthe name of light phenomena often seenphenomena often seen in the northern partsin the northern partsof the world, haveof the world, haveother name is Auroraother name is AuroraBorealis.Borealis.

What causes them?What causes them?

• Northern lights are from the sun. The sun Northern lights are from the sun. The sun gives off the plasma; the Earth’s North and gives off the plasma; the Earth’s North and South have big attraction so the plasma is South have big attraction so the plasma is attracted to North and South. When the attracted to North and South. When the plasma enters Earth’s atmosphere the plasma plasma enters Earth’s atmosphere the plasma makes friction with atmosphere. This time the makes friction with atmosphere. This time the color will come out. These plasma clouds color will come out. These plasma clouds travel through space with speeds from 300 to travel through space with speeds from 300 to 1000 kilometers per second.1000 kilometers per second.

The Northern Lights photo.The Northern Lights photo.

The formation of the AuroraThe formation of the Aurora

• When the first human looked up at the sky When the first human looked up at the sky

he was scared by the lights. For hundreds of he was scared by the lights. For hundreds of

years the Northern Lights has been a years the Northern Lights has been a

"mystery." Over the years, people have "mystery." Over the years, people have

developed their own legends. Eskimos say that developed their own legends. Eskimos say that

the Aurora is the soul of the dead or the spirits the Aurora is the soul of the dead or the spirits

that guide them to heaven.that guide them to heaven.

The Northern Lights photo.The Northern Lights photo.

Where auroras appearWhere auroras appear

• Auroras appear in Alaska in the northern Auroras appear in Alaska in the northern hemisphere, North Canada, Siberia, hemisphere, North Canada, Siberia, Greenland and Iceland and on the southern Greenland and Iceland and on the southern tip of the north coast of Norway. It is mainly tip of the north coast of Norway. It is mainly in the southern hemisphere near Antarctica.in the southern hemisphere near Antarctica.

The place of aurorasThe place of auroras

The red point.

Changes in the twinklingChanges in the twinkling

• Auroras have no fixed pattern and colors Auroras have no fixed pattern and colors

are not the same. Some auroras are green, are not the same. Some auroras are green,

white, yellow and blue. Some time it is white, yellow and blue. Some time it is

gorgeous purple. Auroras occur only in cold gorgeous purple. Auroras occur only in cold

autumn night and high-latitude regions. Theautumn night and high-latitude regions. The

best time to see it is 22:00 to 2:00. best time to see it is 22:00 to 2:00.

Sometimes the light show lasts around 1 Sometimes the light show lasts around 1

hour . hour .

The Northern Lights photo.The Northern Lights photo.

QuestionQuestion• What is other name for Northern Light?What is other name for Northern Light?

• Where you can see the Northern Light?Where you can see the Northern Light?（（ Three places.Three places. ））

• Who say the Northern Light is the soul ofWho say the Northern Light is the soul ofthe dead or the spirits that guide them tothe dead or the spirits that guide them toheaven. heaven.

• What colors is the Northern Light? What colors is the Northern Light?

QuestionQuestion

• How is Northern Light produce?How is Northern Light produce?

• What time is good to see Northern Light?What time is good to see Northern Light?

• WhWhy y the plasma will go the the plasma will go the North and SouNorth and South?th?

• Can you see Can you see Northern Light Northern Light every day?every day?

QuestionQuestion• What thing is disturbed, when the What thing is disturbed, when the

Northern Light appear?Northern Light appear?

• Can Can Northern Light Northern Light move? move?

• The information are from:The information are from:http://virtual.finland.fi/finfo/English/aurora_borealis.htmlhttp://baike.baidu.com/view/35096.htmhttp://www.northern-lights.no/

THE ENDTHE END