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
-Retrograde motion is explained by the orbital speeds of planets
<u>Both models</u>:- Epicycles and deferents help explain planetary motion
-Planets move in circular orbits and with uniform motion
-The brightness of a planet increases when the planet is closest to Earth
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.
Answer:
c. abiotic factors that are not involved in maintaining a population near its equilibrium.
Explanation:
They are both natural disaster and they are not dependent on the population.
Answer:
We should limit the use of carbon dioxide,such as making more electric cars,and limit greenhouse gasses.
Answer:
D. Most European nations are part of the European Union.
Explanation:
Just took this test
Answer:
Ellen gave 24 inches of her ribbon to the friend.
Explanation:
The total length of ribbon Ellen has = 20 feet
Used to make pillows = 12 feet
Remaining ribbon = 20-12 = 8 feet
Given to her friend = 1/4
1/4 of 8 = 1/4 × 8 = 2 feet
so she gave 2 feet of ribbon to her friend.
- As there are 12 inches in 1 foot.
so
2 feet in inches = 24 inches
Therefore, Ellen gave 24 inches of her ribbon to the friend.
