To find the epicenter (the point on the earth's surface where an earthquake begins) during earthquakes, one need to view the seismogram (a record of the ground motion), and at least two other seismographs recorded for the same earthquake. Other instruments such as a map, a compass for sketching circles on the map, a ruler, and a pencil will also be used.
The following are the steps of the triangulation process in the correct order to find the epicenter during earthquakes:
Step 1: Subtract the time of P wave arrival from S wave arrival.
Step 2: See what the time difference is equal to in distance on a seismic wave chart.
Step 3: Draw circles representing the distances from at least three seismograph stations to the epicenter on a map.
Step 4: Find the point where all 3 circles intersect, and you've found the earthquake's epicenter.
TRUE i just took the test and it was correct
Answer:
Explanation:
1. Which will be the most urbanised continent in the year 2030? North America
2. What percentage of total population of the world is expected to live in cities by 2030?
61%
3. Identify the continent which is urbanising faster than other continents.
Latin America: 42% to 85%
4. Which will be the least urbanised continent in the year 2030?
Africa: 54%
5. What percentage of total population of the world was living in urban areas in the year 1950?
29%
Transhumance is pastoral nomadic people who move their livestock from one pasture to another on a seasonal basis.
