<span>To a first approximation, the Earth's magnetic field resembles that of an enormous bar magnet. The field lines emerge from the southern half of the earth and re-enter in the northern half.
Several features of the Earth's field vary in a predictable way across the surface of the globe and might, in principle, be used in assessing geographic position. For example, at each location on the Earth, the field lines intersect the Earth's surface at a specific angle of inclination. On the diagram above, note that near the equator, the field lines are approximately parallel to the Earth's surface; the inclination angle in this region is said to be 0°. As one travels north from the equator, however, the field lines become progressively steeper. At the magnetic pole, the field lines are directed almost straight down into the Earth and the inclination is said to be 90°. Thus, inclination angle varies with latitude. As a consequence, an animal that has the ability to distinguish between magnetic inclination angles has a mechanism that it might be able to use to approximate its latitude. As we will discuss, hatchling loggerheads have been shown to have this ability.<span>A second geomagnetic parameter that varies across the surface of the Earth is the strength or intensity of the field. Although intensity varies somewhat less predictably than inclination, the general trend is that the field is strongest near the magnetic poles and is weakest near the equator. Hatchling loggerheads have also been shown to detect magnetic field intensity.Important Features of the Earth's field:<span><span>Inclination angle: The angle at which the magnetic field lines intersect the surface of the earth. This angle ranges from 0 degrees at the equator to 90 degrees at the poles.</span><span>Intensity: The magnetic field also varies in strength over the earth's surface. It is strongest at the poles and weakest at the equator.</span></span></span></span>
Well the big cities were by the river back then for importing goods by the boat
The correct answers are:
a. bridges suspended almost 100 feet off the ground; to be able to walk among the top canopy of a rainforest means that bridges suspended of around 100 feet are required. This is due the fact that in the fierce competition of the trees in the rainforest for getting sunlight, some species manage to reach very big heights to overshadow their competition.
a. True; reclamation can restore an environment affected by mining and mostly return it to a state to be able to sustain its ecosystem. Even though it is not the most perfect method and there's still consequences to the ecosystem, still it is the best so far that manages to return the environment close to its initial shape. Unfortunately it is not a widely used method and the mining companies should definitely be forced to practice it much more.
Answer:
The correct answer is B. Migrating centers of low pressure in the Northern Hemisphere are also called tropical cyclones.
Explanation:
A tropical cyclone is a stormy formation generated by hot water bodies that evaporate in areas of low pressure and strong winds. This combination generates dense and warm clouds, that when colliding with the cold winds of the heights and the low atmospheric pressures develop intense storms that are fed back with the water that continues rising from the surface of the ocean. Thus, the cyclone grows in size and, driven by the coriolis effect, begins to rotate on its axis and acquire greater speed.
The three types are divergent, convergent, and transform boundaries.
