Answer: 1. recollapsing universe
4. critical universe
3. coasting universe
2. accelerating universe
Explanation:
The universe is continually growing and galaxies are moving apart relative to one another.
These four models foresee the expansion and possible contraction of the universe.
Recollapsing universe: this model predicts that galaxies will stop growing apart and start getting closer to one another. It predicts that there is enough density to stop the growth of the universe in the future.
Critical universe: the universe has the same density as the critical density. This is the difference between the density the universe requires to stop and that of a universe with too little density to ever stop expanding
.
Coasting universe: has enough density to enable galaxies to keep growing apart
, in essence, less than the critical density.
Accelerating universe: this model explains that the distance of far-off galaxies is growing exponentially from an observer over time.
Answer:
The color of the star will tell you the star's surface temperature in the black body radiation scale.
The correct answer is - Mediterranean scrub forest.
Most of the Mediterranean region in Europe, including Greece with all of its islands, are part of the Mediterranean scrub forest biome. This biome is characterized with low forests and scrubs that are very resilient to prolonged droughts and high temperatures. The animals also are highly adapted, and they do not require lot of water to survive. In this biome the summers are long, dry, and hot, while the winters are mild and wet.
Answer:
the process of improvement
Answer:
The statement is true. Las Vegas, Nevada, has seen a great increase in the demand for water since it is one of the fastest growing regions in the U.S.
Explanation:
Las Vegas is the most populous and most densely populated city in the state of Nevada. It is located in the south of the state, in Clark County.
According to the 2010 national census, the city itself has 583,756 inhabitants, and its metropolitan region has about 1.9 million inhabitants. It is the 30th most populous city in the United States and is considered to be the fastest growing city in all of North America.
Population growth was especially marked in the 1990s, when the population went from a little over 200,000 people to more than 500,000. This brought a consequent lack of resources due to the desert location of the city, which was solved only with investment in infrastructure by the state government.
