SCIENCE
EARTH SCIENCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
mantles
|
|
|
layers of crust
|
|
|
cores
|
|
|
atmospheres
|
Detailed explanation-1: -Inge Lehmann, (born May 13, 1888, Copenhagen, Denmark-died February 21, 1993, Copenhagen), Danish seismologist best known for her discovery of the inner core of Earth in 1936 by using seismic wave data.
Detailed explanation-2: -Inge Lehmann (1888-1993), discoverer of the Earth’s inner core.
Detailed explanation-3: -The core is made of two layers: the outer core, which borders the mantle, and the inner core. The boundary separating these regions is called the Bullen discontinuity. Outer Core The outer core, about 2, 200 kilometers (1, 367 miles) thick, is mostly composed of liquid iron and nickel.
Detailed explanation-4: -Discovery of the outer core: 1906 British geologist Richard Oldham discovered the Earth’s outer core. Earthquake waves interacting with this layer showed that the outer core is liquid, while the mantle is solid.