Answer:
Explanation:
Geodesy, the science of measuring the Earth's shape and positions on it, allows the measurement of plate motion directly using GPS, the Global Positioning System. This network of satellites is more stable than the Earth's surface, so when a whole continent moves somewhere at a few centimeters per year, GPS can tell.
GPS uses a system of satellites to triangulate the position of a receiver anywhere on Earth. By using a network of receivers near plate boundaries, scientists can very accurately determine how the plates behave
The Ice Ages shaped and sculpted the face of the Earth. Continents that were once connected by land bridges had shifted and separated during the Ice Ages. Therefore without the Ice Ages, Earth would look significantly different, and some of the natural beauties like Niagra Falls would not exist.
The iron in the earth's core is solid due to high pressure.
At the center of the earth is solid inner core, whose size is two-thirds of moon's size mad made up primarily of iron. The temperature in this core is equal to that of the sun's surface at 5,700 degrees Celsius. But the tremendous pressure caused by gravity prevents the iron from becoming liquid.
Surrounding this is the outer core made of nickel and small quantities of other metals and these remain liquid because the pressure here is a bit lower.
