The earth rotating on its axis. When the northern hemisphere is facing the sun it is summer. In the southern it is winter.
The Earth's Tilt :D
The Earths Inclination A+
The season
The longest season on the northern hemisphere is summer.
sawyer killed the marshall
Dr. Helen Bryce was the one who was responsible for the attempted death of Lex Luthor in Season 3 of Smallville.
is mount novarupta responsible for any of earths surface changes
Earth's precession
G
photosynthesis
The weight.
Yes.
Controlling the earth's tides.
It is summer when the sun is heating earths surface the most.
Gravity.
Gravity.
The Earths Inclination A+
Yes.