The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer.
D. high and low levels of silica in the different type of lava.
Explanation:
The volcanoes have different types of explosions. Some tend to be highly explosive, some less explosive, some don't have explosions at all, while some have combinations of different eruptions. The reason for this diversity in the eruption types is mostly the composition of the magma, or rather how high is the silica content in it.
Basically, the higher the silica level in the magma the higher the explosiveness, and the lower the silica level the lower the chances of explosiveness. This is the case because the higher amount of silica makes the magma thicker, so the gasses are trapped and they explode, while when the lower silica content makes the magma less thick, so the gasses are not trapped and explosions are lacking.
X has an elevation of 1600m
Y has an elevation of 1240m
Difference between the two elevations: 1600-1240=360m
Answer:
The Fertile Crescent was good for farming because of the fertility of its land, a result of irrigation from numerous large rivers in the region.
Advantages:
Irrigation and agriculture developed here because of the fertile soil found near these rivers. Access to water helped with farming and trade routes. Soon, its natural riches brought travelers in and out of the Fertile Crescent.
Disadvantages:
Since the world's earliest civilizations developed in the Fertile Crescent, it is not hard to imagine that there are many geographical advantages. The presence of two rivers and the sediment they leave behind after flooding made for successful crop surpluses. But the Tigris and Euphrates Rivers were also a disadvantage..
Please show me a picture of the map.
