What is the current axial tilt of the earth?
A) 24 degrees B) 45 degrees C) 21.5 degrees D) 23.5 degrees
Question 2
The Kurgans, identified as the first Proto-Indo-European speakers by archaeologist Marija Gimbutas
A) conquered much of East Asia several thousand years ago.
B) were a Germanic tribe that invaded England.
C) were herders from the steppes of today's Russia and Kazakhstan.
D) preserved Basque in present-day Spain.
E) were the earliest speakers of Sino-Caucasian, which they diffused through conquest.
The open ocean is the most extensive biome on earth.
Tiny 'Spherules' Reveal Details About Earth's Asteroid Impacts
The Sun as it appears from the surface of the Earth at sunrise.
The Tilt of Earth’s Axis
Earth emits radiation back out to space from all surfaces, both day and night
Orbital Motion of Earth and Other Planets