Earth has a magnetic field that acts like that of a giant bar magnet. This magnetic field protects the Earth and organisms from harmful particles from the sun by deflecting most of them to the magnetic poles. It also allows for navigation as compasses can detect magnetic north. Many animals like birds and sea turtles have developed the ability to detect and use the Earth's magnetic field to aid migration and return home.

1. EARTH
MAGNETIC FIELD
BY
M.SYEDALI FATHIMA M.SC., B.ED
VOC COLLEGE OF EDUCATION
THOOTHUKUDI

2. WHAT IS EARTH MAGNETIC FIELD?
Did you ever use a compass like the car
compass in Figure below? The pointer
in a compass always points north
because Earth is a giant magnet. In this
lesson, you’ll learn why Earth is a
magnet and how Earth’s magnetism
benefits living things.

5. BENEFITS OF
EARTH’S
MAGNETIC FIELD
• Earth’s magnetic field helps protect Earth and its
organisms from harmful particles given off by the sun.
Most of the particles are attracted to the north and south
magnetic poles, where Earth’s magnetic field is
strongest. This is also where relatively few organisms
live.
• Another benefit of Earth’s magnetic field is its use for
navigation. People use compasses to detect Earth’s
magnetic north pole and tell direction. Many animals
have natural "compasses" that work just as well. Birds
like the garden warbler in Figure below use Earth’s
magnetic field to guide their annual migrations. Recent
research suggests that warblers and other migrating
birds have structures in their eyes that let them see
Earth’s magnetic field as a visual pattern.

7. TURTLES USE THE EARTH’S
MAGNETIC FIELD AS A GLOBAL GPS
The turtles also rely on Earth's magnetic field
to find their way home. That's because each
part of the coastline has its own magnetic
signature, which the animals remember and
later use as an internal compass.

8. AT THE END OF THIS REFLECTION SECTION
I HOPE ALL ARE HAVE A CLEAR IDEA ABOUT
EARTH MAGNETIC FIELD
THANKYOU