<span>The approximate lifetime of a star like our Sun is in the range of 10.3 billion years. At a current age of 4.6 billion years, this will leave (10.3 - 4.6) or approximately 5.7 billion years before the supply of hydrogen fuel (and thereby, helium) will run out.</span>
Answer:
1. disk
2.halo
3. globular cluster
4.spiral arm
5. spiral galaxy
6. bulge
Explanation:
1. In Spiral or Lenticular galaxies, the galactic disk is the flat portion that consists of 2 components; the stellar component and the gaseous component. The stellar component consists of the galaxy stars while the gaseous component consists of cool gas and dust.
2. The galactic halo is the first portion of the galaxy to be formed. Formation of halos is caused by increased gravitational effects and the presence of primordial black holes. When baryonic and dark matter merges, halos are formed.
3. A globular cluster is a large compact spherical star cluster, typically of old stars in the outer regions of a galaxy.
4. Spiral arms are region of a large concentration of stars in a spiral galaxy. This large concentration of stars are usually very bright and easily noticeable.
5. The Milky Way galaxy consists of flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge. The spiral arm that I explained above extends from the center of spiral galaxies. This extension makes it resemble a spiral and thus give spiral galaxies their name.
6. The bulge is a large concentration of stars.
Answer: Copper, iron, lead, zinc, gold, silver, and tin. Hope this helps :)
<span>1. What Mountain range near the Pacific coast still has active volcanoes?
</span>Coast Mountains<span>
2. What landforms make up Alaska?
</span>Some major landforms in Alaska include Mount McKinley<span>, the </span>Kenai Peninsula<span>, the </span>Aleutian Islands<span>and part of the </span>Rocky Mountains<span>.
</span>
<span>1. The largest Salt Lake in the Americans this lake changes in size because of evaporation?
</span>Great <span>Salt Lake
</span>
<span>2. The lake is located high in the Sierra Nevada mountain range it is a popular place for boating and other types of water recreation?
</span><span>Lake Tahoe
</span>
<span>3. This lake was formed the wind to do over dam was built on the Colorado river it is also a cop there recreation area?
</span><span>Lake Mead
</span>
<span>4. One of the most important Rivers west of the Mississippi this server begins in the Rocky Mountains and flows through south and west to empty into the gulf of California?
</span><span>Colorado River
</span>
<span> 5. Located north of the Colorado river this river flows from the mountains to the Pacific Ocean?
</span>Columbia River<span>
6. These two rivers run Westword and feed into the Columbia River?
</span>Snake and Willamette<span>
7. These five rivers flow east word and four of them Empty into the Mississippi River?
</span><span>Missouri, Platte, Kansas, Arkansas and Rio Grande</span>
