Natural Causes Of Glacial Retreat And Advance

Question 1

Volcanic Activity

Answer 1

Major volcanic eruptions eject a cloud of ash and dust high into the air which blocks out some of the sun’s rays and lead to brief periods of cooling

Question 2

Orbital changes

Answer 2

Earth’s orbit changes every 100 000 years or so. This change, from a more circular to an egg-shaped pattern changes the amount of sunlight we receive

Question 3

Movement of tectonic plates

Answer 3

The earth’s continents move and occasionally collide with each other. These collisions set of a complex series of events that change the earth’s climate

Question 4

Sunspot Activity

Answer 4

Sun spots are areas of uneven temperatures on the sun’s surface and can be seen as black spots on the sun’s surface. It appears every 11 years (or so). It changes the amount of solar energy we receive