Requirements for an ice age on Earth include:
A) a weaker Sun.
B) continents located at low latitudes.
C) larger obliquity angle.
D) smaller obliquity angle.
E) continents located at high latitudes.
Question 2
Which is NOT true about Celtic languages?
A) They were threatened by extinction in England.
B) They are still spoken by people in France.
C) They have been revived in some parts of the British Isles.
D) They have an extensive body of literature.
E) They share common language structure with Finnish and Hungarian.
Changes in Earth's atmospheric carbon dioxide levels over geological time.
Speed of Earth
Lightning on Earth
Planets, Earth and Moon
The Distribution of Water on Earth
Earth 65 Million Years Ago