Answer: b. comparing the arrival times of the P-and S-waves.
Explanation: The epicenter of earthquakes is the location where the earthquake starts in the earth crust. To calculate the distance to the epicenter of an earthquake, you need to compare the arrival times of the P waves and the S waves. On a seismograph, a line is equivalent to 1 minute but it depends on the scale used.
Determine the magnitude of the earthquake by plotting the distance and amplitude on a chart and joining the two points.
Triangulation is then used to locate the epicenter. Three circles with a radius of the magnitude are drawn around the affected parts. The epicenter is the point where these circles meet.
The chemical make-up of a rock refers to its composition. Your answer is correct. This is because geologists determine the amount of occurring inorganic solids and chemical composition in minerals the make-up a particular kind of rock. The variety of arrangements of chemical elements in a rock determine its basic or complex composition.
Answer:
C. the Gobi
Explanation:
Currently, the Gobi is the only current growing desert in China.
<u>RESEARCH ON PROXIMA CENTAURI:</u>
- Robert Innes discovered proxima centauri which is closest to the Sun in 1915 and it is believed to be 4.85 billion years old.
- Innes used a blink comparator though later he was in competition with another scientist named, Voute who provided theoretical values pertaining to the star more accurately than Innes.
- The recent findings found a planet which is located close to the Proxima Centauri making it the closest planet to our Solar System.
well i can say for sure that it dose not steadily increase. the troposphere gets colder as you ascend so its the exterior temperature slowly decreases. (apex)
