Climate change refers to changes in weather patterns over decades or longer. It may involve changes in average conditions or more/fewer extreme weather events. The two major causes of climate change are natural factors like continental drift, ocean currents, volcanic activity, and the Earth's tilt, as well as human-caused increases in greenhouse gases. Continental drift changes land and ocean positions affecting winds and currents over millions of years. Volcanic eruptions eject gases and particles into the atmosphere, and changes in the Earth's tilt can impact season severity.

2. WHAT IS CLIMATE
CHANGE?

3. CLIMATE CHANGE-is a change in the
statistical distribution of weather patterns
when that change lasts for an extended
period of time (i.e., decades to millions of
years).
 Climate change may refer to a change in
average weather conditions, or in the time
variation of weather around longer-term
average conditions (i.e., more or fewer
extreme weather events).

4. TWO MAJOR CAUSES OF
CLIMATE CHANGE
NATURAL
 Continental Drift-- The continents that we are
familiar with today were formed when the landmass
began gradually drifting apart, millions of years back.
This drift also had an impact on the climate because it
changed the physical features of the landmass, their
position and the position of water bodies. The
separation of the landmasses changed the flow of
ocean currents and winds, which affected the climate.
 The earth’s tilt
 Ocean Currents

5. Volcanic Activity
 When a volcano erupts it throws out large volumes of
sulfur dioxide (SO2), water vapor, dust, and ash into the
atmosphere.
•The earth’s tilt
If there was no tilt we would not have experienced seasons.
Changes in the tilt of the earth can affect the severity of the
seasons - more tilt means warmer summers and colder
winters; less tilt means cooler summers and milder winters.