It seems that you have missed the necessary options for us to answer this question, but anyway here is the answer. Water moving roughly parallel to the shoreline is called a l<span>ongshore current. Hope this answers your question. Have a great day!</span>
An appositive is a phrase or a word that renames a noun right beside it. Among the choices listed, the best answer is option C. <span>One cause of erosion, wind, can create alterations in the surface layers of rock. Erosion here renames wind.</span>
i need the vocab words for this.
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.
