Predict/Explain The Speed of the Earth The orbital speed of the Earth is greatest around January 4 and least around July 4. (a) Is the distance from the Earth to the Sun on January 4 greater than, less than, or equal to its distance from the Sun on July 4? (b) Choose the best explanation from among the following:
I. The Earth’s orbit is circular, with equal distance from, the Sun at all times.
II. The Earth sweeps out equal area in equal time, thus it must be closer to the Sun when it is moving faster.
III. The greater the speed of the Earth, the greater its distance from the Sun.
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