<span>Most of the charged particles from the sun are deflected around earth by the Earth's magnetic field.
Inside the Earth lies molten core. High percentage of the core is iron. This iron rotates around the center and create magnetic field. This field extends out of the Earth into the space. It surrounds Earth and protects it from the charged particles. Those particles are diverted to the magnetic poles and they create lights in the atmosphere by reacting with gases in atmosphere. On the north magnetic pole we can see northern lights (aurora borealis) and on the south magnetic pole we can see south lights (aurora australis).</span>
Geologists have recently determined that the minerals goethite and hematite exist in abundance on Mars, sure signs of the presence of water (see Figure 1 for a picture). None of those geologists have been to Mars, of course, but the unmanned rovers Spirit and Opportunity have. These rovers are equipped with three mass spectrometers, each of which is capable of determining the chemical composition of a solid with a high degree of accuracy. With such a precise chemical analysis in hand, geologists on Earth had no problem identifying the minerals.
A mineral is defined in part by a specific chemical composition. In theory, therefore, it is always easy to identify a mineral, if you can determine the chemical composition with a mass spectrometer like the Mars rovers. In reality, however, even if you are looking at rocks on Earth, determining the exact chemical composition of a substance involves significant time preparing the sample and sophisticated laboratory equipment (and often significant money). Luckily, it is usually unnecessary to go to such lengths, because there are much easier ways that require little more than a magnifying lens and a penknife.
Answer:Why are many fishing boats found near ocean upwellings?
Many marine species gather there to eat the nutrients brought to the surface.
Explanation:
