Revolution of the Earth Around the Sun-Discover how the revolution of the Earth around the Sun and how this action, combined with the tilt on the Earth's axis causes seasons.
(this action; combined; with the tilt on the Earth's axis) (how the revolution of the Earth around the Sun and how this action, combined with the tilt on the Earth's axis; causes; seasons)
this action how the revolution of the Earth around the Sun and how this action, combined with the tilt on the Earth's axis
combined causes
with the tilt on the Earth's axis
seasons