Answer:
c) Magma C
Explanation:
The magma marked with C, is a felsic (rhyolitic) magma. This type of magma has high content of silica, making it highly viscous, and it also has high content of gases. The high content of gases comes from the high viscosity, as the gases are trapped inside the magma and can not get out of it. This results in eruptions of explosive or effusive type. When the magma rises, the temperature and pressure change, with results in explosion of the trapped gases in the highly viscous magma. Through this explosion, lot of pyroclastic material is shot out of the volcano in the surrounding area, making it very dangerous for everything in its surrounding area.
Answer:
measures both luminosity and distance
Explanation:
Apparent magnitude (m) is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's light caused by interstellar dust along the line of sight to the observer.
The correct answer is - B. Slope of the land.
The watersheds are defined by the slopes. They can be small, medium sized, or very large. All parts of the land on planet Earth belong to one watershed or another.
The watersheds have boundaries, and those boundaries are along the highest points of the mountains or the hills. In most cases, one of the slopes of the mountain or hill is in one watershed, while the other one is in another watershed.
The water from the watershed goes into a single place as its final destination. The water can run down the slope on the ground after a heavy rainfall, get into smaller streams and rivers, get directly into a bigger river, but in the end all of that water will get to the biggest water body in the watershed.
