Multiple Choice
Which of the following observations provided evidence against the geocentric view of the universe?
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8. Centripetal Forces & Gravitation
Newton's Law of Gravity
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Which of the following is the primary cause of the changing seasons on Earth?
A
The varying distance between Earth and the Sun during the year
B
The gravitational pull of the Moon on Earth
C
The tilt of Earth's axis relative to its orbit around the Sun
D
The rotation of Earth on its axis
Verified step by step guidance1
Understand that the changing seasons are primarily caused by the tilt of Earth's axis. Earth's axis is tilted at an angle of approximately 23.5 degrees relative to its orbit around the Sun.
Recognize that this tilt causes different parts of Earth to receive varying amounts of sunlight throughout the year. As Earth orbits the Sun, the tilt remains constant, but the orientation of the axis relative to the Sun changes.
During different times of the year, either the Northern Hemisphere or the Southern Hemisphere is tilted towards the Sun, leading to longer days and more direct sunlight, which results in warmer temperatures and summer.
Conversely, when a hemisphere is tilted away from the Sun, it experiences shorter days and less direct sunlight, leading to cooler temperatures and winter.
The varying distance between Earth and the Sun during the year has a minimal effect on the seasons. The gravitational pull of the Moon and Earth's rotation on its axis do not directly cause the seasons.
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