Africa and Asia is connected by the Middle East
The three classifications of magma are mainly identified using their silica composition. Basaltic magma has the lowest silica content of 45-55% by weight. This makes it the least viscous and least explosive. Andesitic magma has 55-65% , making it more explosive and viscous. Rhyolitic magma has 65-75% silica, and is the most viscous and catastrophic.
<span>the critical latitude for incoming solar radiation, which could affect the formation of ice sheets is </span>65 degrees N
Answer:
I would go with A. Salinity and Temperature
The earliest of civilizations were based around river valleys. This allowed them to irrigate fresh water to their crops allowing for better farming and therefore, bigger and better civilizations.
