Download - Seasons Around The Globe
Seasons Around The
Globe
SeasonsBecause the Earth’s axis is tilted, our planet is in different positions during the year. This is why we have four seasons.
Seasons around the world
Important Dates
Inclination of the Sun
Phases of the MoonPlease take out your notes and
add the following line:
The Moon always shows us the same side. This is because the Moon takes exactly the same amount of time to rotate as it
does to revolve around the Earth.
Polar Auroras
Pola
r Aur
oras
Aurora Australis above Kangarou Island, Australia
Aurora Borealis above Bear Lake, Alaska
Aurora Borealis above Bear Lake
Aurora From Outer Space
Red and Green Aurora from Outer Space
Polar Auroras
Polar auroras are caused by the solar wind. When the solar wind particles arrive near the Earth, they are diverted toward the poles. This is why auroras are usually observed in polar regions.
The arrival of the solar wind particles stimulates the particles in the Earth’s atmosphere. This is what triggers the spectacular light show of the polar auroras. It is usually observed as a green glow shimmering over the horizon.
Types of Polar Auroras
There are two types of polar auroras:• the aurora borealis appears in the
Northern Hemisphere• the aurora australis appears in the
Southern Hemisphere