It is because of subduction<span>: oceanic crust tends to get colder and denser with age as it spreads off the mid-ocean ridges. It gets so dense, that it sinks in the upper </span><span>mantle </span><span>(subduction). This is like a giant recycling system for oceanic lithosphere! Because continental crust is lighter than oceanic crust, continental crust cannot subduct. We therefore still have some very </span>old continental rocks<span> at the surface of the Earth.</span>
<span>Good morning, Susana!
The effects of technology on population growth rates and other related rates are the most diverse. With the turn of the nineteenth century to the twentieth century, we noticed that the increasing presence of technologies and new scientific advances was responsible for the expansion of life expectancy. The possibility of producing more food also motivated the population growth and, consequently, the number of births. The challenges are also varied, including:
- Maintain and expand the quality of life;
- Offer food for all individuals;
- Fight against epidemics and deadly diseases;</span>
Answer:What my answer is to this question is that you can learn this in environmental Science and i know this from experience!!!
Explanation: I know this because I am in high school and I go to a College Prep Charter School
