Documents Myr ago

Puzzle: Ice Ages! Occur with a period of ~ 250 million yr Cycles of glaciation within the ice age occur with a period of 40,000 yr Most recent ice age began ~ 3 million yr…

Documents Gyroscope. What causes the seasons? 1.Seasons are NOT caused by varying distances from the Earth to....

Gyroscope What causes the seasons? Seasons are NOT caused by varying distances from the Earth to the Sun The primary cause of seasons is the 23.5 degree tilt of the Earth's…