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kakasveta [241]
3 years ago
11

What do I do? Can you help me please.

Geography
1 answer:
vlada-n [284]3 years ago
3 0
What do you need help with?

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Why are sedimentary rocks important?
Rom4ik [11]

sedimentary rocks provide geologists with information necessary to study the history of earth.

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Process of Science: Explaining the Motions of Planets. To ancient astronomers, the motions of the Sun, the Moon, and the stars s
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Answer:

<u>Geocentric Model</u>: - this model is Earth Centered

-Retrograde motion is explained by epicycles

<u>Heliocentric Model</u>: - This model is Sun Centered

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<u>Both models</u>:- Epicycles and deferents help explain planetary motion

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Explanation:

Retrograde motion is an apparent change in the movement of the planet through the sky. Ptolemy's model of the solar systems was geocentric, where the Sun, Moon, planets and start all orbit the Earth in perfectly circular orbits. However this perfectly circular orbits around the Earth did not explain the occasional retrograde motion of the planets. In the Copernicus' heliocentric model, retrograde motion of planets is naturally explained. The explanation for retrograde motion in a heliocentric model is that retrograde occurs roughly when a faster moving planet catches up to and passes a slower moving planet.

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Who is the president
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President. Barack Obama
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