Weegy: The Giant-impact theory User: The discovery that the moon is similar in composition to the outer portions of the earth most supports the _____ theory.
synchronous Weegy: The Giant-impact theory User: What causes the seasons on Earth?
Changes in the amount of energy produced in Earth's core during different seasons.
The earth moving closer to and further from the Sun as it orbits.
The tilt of the earth ... (More)