Answer:
crust- the earth's outmost layer
inner core- the metallic layer at the earth's center
lower mantle- hottest part of the mantle
asthenosphere- the semi solid layer between the top layer and the upper mantle
upper mantle- The layer between the asthenosphere and lower mantle
top layer- The firm layer between the crust and the asthenosphere
outer core- The layer surrounding the inner core
Explanation:
Answer:
idk I am sorry. sorry. I have no clue
Answer:
Explanation:
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Answer:
they work together
Explanation:
think of nemo. they live in the anemone and eat it (clean the stuff off) and in return they provide a place for the fish to live
Hope this helped even the slightest :)
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.
