Hydrothermal Vents occur along divergent plate boundaries on the ocean floor. Hydrothermal vent systems give off plumes of hot, mineral-laden water with temperatures as high as 350 degrees Celcius. The water is ejected through a spout known as black smokers. Metal-rich minerals precipitate out of the circling sea water and forms ores of copper, zinc and iron.
<span>The precambrian period was a time period that happened billions of years ago. Actually, 4.6 billion years, to be exact. The Earth started to form during this period. Layers of rock, elements of the land and waters, and many other things were developed during this time. The atmosphere had a mind of its own, per se, during this time period. It went through many different changes. The atmosphere went from being extremely cold and galactic to warming and having volcanoes, which allowed for an expansion of life forms.</span>
Answer:
e) both c) and d) above are correct
Explanation:
The equator is an imaginary line running from east to west that divides the earth into the northern hemisphere and southern hemisphere. The northern hemisphere is the half part of the earth that is north of the equator.
During the summer, the light from the sun shines more directly on the Northern Hemisphere.
Also during summer, the period of sunlight is longer than that of the winter.
<span>A fast-moving flow consisting of a mixture of water and volcaniclastic debris is lahar. It is a kind of mudflow that is made up of materials that flow down a volcano. It has the consistency of wet concrete but they go down volcanoes at rapid speeds.</span>
Answer:
Which statement describes clean air as a natural resource?
Clean air reduces the risk of illnesses and other health problems.
