<u>Answer:
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The build-up of three oxygen created our ozone layer around two billion years ago.
<u>Explanation:
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- The ozone layer is a part of the stratosphere which is located right after the troposphere in the atmosphere of the Earth.
- The ozone gas is made up of the abundance of three oxygen molecules combining with the ultraviolet radiation emitted by the Sun.
- The development of the ozone layer happened around two billion years ago when the oxygen concentration levels on the planet began to rise slowly and gradually.
Answer:
''South Mountain Park and Preserve'' is located south of Phoenix and west of Chandler.
Explanation:
South Mountain Park and Preserve is a municipal park, in fact, it is one of the largest parks of this type in the United States. This park is located just south of Phoenix and just west of Chandler, thus being situated in between large urban areas. Despite being surrounded by urban areas, this park has been well preserved and kept in good shape, while also being made suitable for numerous activities.
This park is very attractive, not just for the locals, but also in the region, as it offers a lot. The lovers of nature often visit the park as it is a very beautiful one, but it also offers very beautiful views. The people that are into extreme sports, such as mountain biking and mountain cycling have a lot of excellent trails. Because of the excellent organization and tracks, the hikers and joggers are a common sight.
Whether an eruption will produce lava flows or pyroclastic debris depends on the viscosity of magma and the gas content
<h3>What is a Volcano?</h3>
This refers to the eruption of hot lava from the surface of the earth as a result of a tectonic shift.
Hence, we can see that the two main factors that determine the content that comes out when an eruption occurs are both the viscosity of the magma and also the gas content.
Read more about volcanoes here:
brainly.com/question/440765
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Newton realized that the reason the planets orbit the Sun is related to why objects fall to Earth when we drop them. The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.
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