This document provides an overview of key facts about Earth, including that it is the only known planet that can support life. It discusses Earth's axis and how its 23.5 degree tilt causes the seasons by changing whether the Northern or Southern Hemisphere is tilted towards the Sun. The geographic poles are where Earth spins on its axis, with the North Pole located in the Arctic Ocean and the South Pole in Antarctica. The equator is an imaginary line equidistant from the poles that divides Earth into the Northern and Southern Hemispheres. Earth has layers like an egg, with an iron core making up a third of its mass, surrounded by a mantle and crust.

1. EARTH
 The only known planet with an
environment to support life.

2.  Earth’s Axis.
 The seasons.
 Poles .
 Equator.
 Geographic Poles.
 Earth’s Layers.
 The Core.
INDEX

3. Earth’s Axis
 The axis is the imaginary
straight line that the
planet spins around.
 The axis of the Earth is
TILTED at an angle of
23.5 degrees and rotates
at this angle.

4. The seasons
 Here is a picture showing Earth’s orbit around
the Sun from the side view of the elliptic path.
The angle of the Earth’s axis is facing toward the Sun in one
position (summer) and away from the sun (winter) in another.

5. Geographic Poles
 The geographic poles
of the Earth are
defined as the
locations where the
Earth spins around its
axis.
 The geographic north
pole is located in the
Arctic Ocean.
 The geographic south
pole is located on
Antarctica.

6. Equator
The Equator usually
refers to an imaginary
line on the Earth´s
surface equidistant from
the North Pole and south
pole , dividing the Earth
into the northern
hemisphere and
southern hemisphere.

7. Earth’s Layers
 How are the earth’s
layers similar to an
egg?
 Shell=crust
 Egg white=mantle
 Yolk=core

8. The Core
 Made mostly of iron
 1/3 of the earth’s mass
 Very hot

9. How we study the Solar System

10. HUBBLE TELESCOPE

11. Thank you for your attention