the lava and pyroclastic that erupted mount. sakuajima volcano consists of medium- K series and endesite - dacite .the composition clearly differ between eruption periods.
The most populated region of Australia is the southeastern coast because drops grow much better there and the vast majority of Australia is desert.
They are found in the tundra regions of Eastern and central Europe. Mostly covered in permafrost, in some areas this frost has melted. The Drunken forest is the reference to the shallowness of where the trees roots are and then the trees start to tip over (Like a drunk man LOL). But within the Northern Hemisphere it alters the life around it and also destroys roads and buildings
I believe it is Sophia, or Sofia.
Answer:
b. flat rotation curves in spiral galaxies
Explanation:
Dark matter accounts for majority of the matter in the universe (about 85%). It is considered to be composed of subatomic particles which are yet to be discovered. Dark matter cannot be observed because it does not emit light that can be detected. Only its gravitational effect is visible.
Astronomers when calculated the mass of the visible matter and tried to account for the observed speed of stars in the galaxy, there was a mismatch. To understand what caused this mismatch, astronomers gave name to the invisible matter as the Dark Matter.
The expected velocity of stars should decrease away from the near the center of the galaxy but a constant velocity of stars was observed that is a relatively flat rotation curve was obtained.
Thus, flat rotation curves in spiral galaxies in an evidence of Dark Matter.
