Climate change key change

Question 1

3 Milankovitch cycles

Answer 1

Eccentricity
Axial - tilt
Precession

Question 2

Process of eccentricity

Answer 2

• Earth’s orbit undergoes a cyclical change from less eccentric to more eccentric and back.
• one cycle lasts for about 100,000 years.
• the larger the eccentricity, the greater is its deviation from a circle.

Question 3

Process of axial - tilt

Answer 3

• Earths axis tilts between 21.5 and 24.5
  hemispheres closer to sun get more heat and others get less
• hottest summers and coldest winter when at maximum tilt
• lasts for about 41,000 years.

Question 4

Precession

Answer 4

Tidal forces from sun and moon cause earths axis to wobble