1. Which observation supported Wegener’s theory of continental drift?
<span>d. (The earth’s rotation could provide enough force to move the continents apart. )
</span>But this is not true. we know today that continents are present on the surface massive slabs called tectonic plates.
2. Which feature do you usually see when tectonic plates move apart?
b. <span>earthquakes
</span>
3. What happens in a convection cell?
b. Cold, dense material moves horizontally, while hot, less dense material moves vertically.
Answer:
Non-bird dinosaurs lived between about 245 and 66 million years ago, in a time known as the Mesozoic Era.
hope this helps <3
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.
<u>Answer:</u>
<em>The Balkans were a group of countries in eastern Europe, between the Austro-Hungarian and Ottoman domains. </em>Their area made the Balkans deliberately significant, so European forces were centered around occasions there.
Prior this year, the European Union discharged its <em>Strategy for the Western Balkans, where the sound extension point of view for the six staying Western Balkan nations was repeated. </em>
Some considered the to be as a route forward, others as a basin of cold water for the district, <em>yet nobody recoiled at the expression Western Balkans itself.</em>
