Ferromagnesian vs. non-ferromagnesian
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1-Contains Magnesium and Iron 1- Contains little or no Magnesium &
as major components Iron
2- Color: very dark 2- Color: Generally lighter
3- Density relatively high 3- Density relatively low
Answer:
But what impact is all of this social networking having on young minds?” Teens' developing brains are extremely vulnerable to so much time online, and because they often have difficulty self-regulating their screen time, risks increase which means they are more susceptible to peer pressure and cyberbullying.
Explanation:
Answer:
- Plate movements on Earth’s crust create stress.
- This adds energy to the crust, which then bends and breaks, forming mountains and geological basins.
Explanation:
The tectonic plates literally float over the magma. Thus, what makes the tectonic plates move is precisely the movement of this magma! And this movement does not happen at all, but in a cyclical variation, which we call Earth convection currents or cells.
The movement of tectonic plates moving over the asthenosphere (pasty part) interacting over time in a geodynamic process that results in the origin of mountains and geological basins, causing seismic quakes (earthquakes and tidal wave), volcanism, magmatism and other geological events (formation of mountain ranges and underwater pits) all due to these plate movements.
C
Given that the World population changed little between this time, we can gather than the birth and death rates were similar, since they seem to cancel each other out from 1200-1400. To clarify, think of this. If you add something to a total (think births to population), but take away the same number (think deaths from population) you end up with the same total as before. Because of this, A is the correct answer choice (The birth rate and death rate were about equal).
