the area of unstable plate tectonics that causes earthquakes and volcanic activity along the Pacific Ocean is known as the ring of fire. The ring of fire is also known as circum-pacific belt. It is a 40,000 kilometer horseshoe shaped area that includes 452 volcanoes and accounts for approximately 90 per cent of the worlds earthquakes.
They used the stars to guide them, in the northern hemisphere Polaris is always to the north. They can also use where the sun and moon rise and set. Rises in the east sets in the west.
