the oldest ocean floor is only 180 million years old, because the oldest crust is destroyed at subduction zones.
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What are subduction zones?</h3>
According to NOAA, tectonic plates are fragments of the Earth's hard outer layer that steadily travel across the surface of the globe over millions of years (opens in new tab). (This is a fundamental principle of the theory of plate tectonics, which holds that pieces of the Earth's crust slide across the lower mantle and carry continents with them.) According to the U.S. Geological Survey(opens in new tab), the Earth's crust and the top part of the mantle, a thick, heated layer under the crust, make up that outer layer, also known as the lithosphere (USGS). This lithosphere material curls downward into the heated mantle during subduction zones, when two tectonic plates collide and one slides beneath the other.
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Answer:
Option (C)
Explanation:
Charts and graphs are the most common features that are used in order to show and highlight data in a preferred and simple way. It helps in a clear understanding of any topic, as the charts are comprised of figures and graphs show the relationship between two things. It provides accurate and valuable information. These are also considered to be a simple, meaningful and attractive design and are widely used during the presentation of any topic.
These graphs and charts are made using different colors, and the number of colors are not fixed. It has a wide range of colors.
Thus, the correct answer is option (C).
Answer:
O autor que dizer que a civilização esta sendo modelada e modificada de forma que, o modelo de civilização que conhecemos será desconsiderado e dará lugar a um modelo atualizado.
Explanation:
Quando o autor fala "o novo modelo de civilização a que estamos presenciando", significa que existem fatores externos que estão modificando e atualizando a civilização que conhecemos, trazendo novos conceitos e costumes, remodelando a sociedade. Isso faz com que o conceito que tinhamos de civilização fique desatualizado e que um novo modelo esteja sendo estabelecido e que esse novo modelo se tornará a base da nova civilização.
Answer:
I don't know the answer but I think it is this
Explanation:
Answer:
Geocentric Universe Model
His fundamental contribution was his model of the universe: he believed that the Earth was motionless and occupied the center of the universe, and that the Sun, the Moon, the planets and the stars revolved around him.
Explanation:
The first thing that Ptolemy does is justify a universe based on the geocentric system described by Aristotle. It is a vision of the world based on the fact that the Earth is fixed and around it the sphere of the fixed stars rotates every day, taking with it the spheres of the sun, the moon and the planets, using combinations of circular movements called epicycles. Once this model is established, Ptolemy goes on to describe the mathematics he needs in the rest of the work. In particular, it presents trigonometric methods based on the Crd (string) function (which is related to the sine function by sin a = (Crd 2a / 120)).
In examining the theory of the sun, Ptolemy compares his own observations of the equinoxes with those of Hipparchus and with the ancient observations of Meton in 432 B.C. He confirmed the duration of the tropic year as 365 days and 1/4 minus 1/300 of the day, the exact value obtained by Hipparchus. As Ptolemy knew, the accuracy of the rest of his data depended heavily on this value and the fact that the true one is 365 days and 1/4 minus 1/128 of the day, produced errors in the rest of his work
