Answer:
A. The astenosphere is denser than the lithosphere
Explanation:
The theory of isostasy is a theory that suggest that the layers of Earth are arranged in accordance to their density. It is a theory that usually refers to the mantle and crust. The mantle (astenosphere) is denser than the crust (lithosphere), so the crust floats on top of it, depending on its density, with he continental crust being higher, while the oceanic crust being lower. The two forces that are responsible for this are the gravity and buoyancy.
I’m not sure about all, so I’m going to answer the ones that I’m sure.
El río Mississippi
El Golfo de México
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.
Answer: is constant
Explanation:
In order to analyze the velocity of the stars within a galaxy, the <u>galaxy rotation curves</u> (developed by the American astronomer Vera Rubin) are used. These graphs are elaborated as a scatter diagram in which the orbital velocity of the stars present in a galaxy is represented on the Y axis and the distance of these stars to the center of the galaxy on the X axis.
Thanks to this diagram, it has been possible to observe a characteristic behavior in the rotation speed of the stars (and gas) present in the galaxies, which differs from the rules of the orbital movement of the planetary systems postulated by Newton and Kepler.
This means that in these galaxy rotation curves it has been observed that the rotation speed of stars and gas is "constant", regardless of the distance to the center of the galaxy. This discrepancy and these results were then used to demonstrate the existence of dark matter in the universe.
