Climate Change: A Journey
Through Time
This presentation explores the history of climate change on Earth, from
ancient ice ages to the current warming trend.
by Mr. Moath Rafat
Defining Climate
Climate refers to the long-term patterns of temperature, wind, and
rainfall on Earth.
Ice Ages: A Frozen Past
Ancient Ice Ages
Cycles of Change
The first known ice age occurred about 2 billion years ago.
Earth has cycled between warm periods and cold periods
(ice ages).
Snowball Earth: A Global Freeze
1
Global Ice Cover
About 650 million years ago, Earth may have been
covered in ice.
2
Uncertain Causes
The cause of Snowball Earth is not fully understood.
Asteroid Impacts:
1
Asteroid Collision
470 million years ago, two asteroids collided in space.
2
Dust Cloud
The collision produced a large amount of dust,
blocking sunlight.
3
Ice Age
The dust caused an ice age on Earth.
The Dinosaur Extinction
Asteroid Impact
67 million years ago, an asteroid collided with Earth.
Global Devastation
The impact caused a massive tsunami and threw dust
into the air.
Extinction Event
The climate changes led to the extinction of dinosaurs.
Monitoring Potential Threats
Scientists monitor potentially
Risk assessment considers size,
dangerous objects in space.
distance, and potential impact.
Climate Change Today and
in the Future
Earth's climate is now warming due to increased carbon dioxide in the
atmosphere.