Transcript Earth - Miss Delo`s Wiki

Earth
Our Home Planet
Does Earth really move?
• We say that the Sun rises
in the east, sets in the
west and moves across
the sky in between. The
Sun just looks like it is
moving because Earth is
moving and spinning.
• How is this possible??
We can’t feel the Earth’s
movement. The ground
feels perfectly still…
Earth Moves
• This spinning motion is called ROTATION.
• There is an imaginary line, called an axis, that
runs through the North Pole and the South Pole.
The Earth spins like a top on this axis.
• It takes 24 hours for Earth to spin all the way
around. I wonder??
• Is that why we have
24 hours in a day??
• Earth also orbits or
revolves around the Sun
Effect of the Earth’s Rotation
• As Earth rotates one side
of Earth faces the Sun
while the other side faces
away from the Sun. This
gives us daytime and
nighttime.
• When your side of Earth
faces the Sun, it’s
daytime. When your side
of Earth turns away from
the Sun it’s nighttime.
The Reason for Seasons
• Earth’s axis is tilted.
• Having a tilted axis means that Earth slants a
little to one side as it revolves around the Sun.
• Earth’s axis always points in the same direction,
towards the Northern Star or Polaris.
• The tilt of Earth’s axis is what causes seasons
• Learn More… Video
Seasons
• We have four seasons. Can you name them??
• Summer, Fall, Winter and Spring
• We now know that they occur because the Earth
is tilted on its axis in space. Earth also revolves.
• Did you know that as the Earth revolves, we are
closer to the Sun during some parts of the year
than at other parts of the year??
• It takes 365 and ¼ days for Earth to revolve
around the Sun!
Earth – Our Home Planet
• Earth is a planet, which means it revolves
around a star and doesn’t produce its own
light. Earth gets its light from the Sun.
8 planets, including the Earth
orbit around the Sun. Since
the Sun is a star it doesn’t
move. Sometimes the night
sky looks different but that is
because the Earth is rotating
and revolving.
Earth
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Earth only has one moon.
Earth, Moon and Sun
Earth and Moon – Phases
Earth also has gravity.
There is more gravity on
the Earth than on the
Moon, which is why you
weigh more on Earth.
• Quick Review
The End