Earth is the third
planet from the sun, and 93 million miles from the Sun's
diameter. Earth is in the shape of a sphere. It is slightly
flat at the north and south poles. Another name for this
kind of sphere is an oblate. The diameter of the Earth is
7,900 miles. The northern hemisphere is a bit longer than
Earth's southern hemisphere. Earth's atmosphere is
made out of 77% nitrogen, 21% oxygen, and traces of argon,
carbon dioxide, water, and dust. The atmosphere keeps high
temperatures and cold temperatures out. It makes the
temperature on Earth just right for life. No other planet in
the Milky Way Galaxy that we know of has an atmosphere like
Earth's atmosphere. The Earth is in a
magnetic pull with the moon and the sun. The magnetic shield
keeps radiation out of the surface of the
Earth. The moon is between
221,000 and 253,000 miles away from the Earth. It is 1/4 of
the size of Earth. The moon is the only natural satellite of
the Earth. The difference of the gravitational pull from the
Earth and the moon makes the tides change.
Earth use to be one
big continent called Pangea! Unlike other planets,
Earth has a solid metal core!
