We can only directly observe the earth's surface and (through mines and wells) get a peek at structures less than half a percent of the way to the center of the planet.
We can observe natural phenomena that bring material up from farther down, such as volcanoes.
We can also use models to predict what earth must be like, knowing the gravity and mass and size of the planet.
We can also use information gained by the reverberations of large surface events to map out the interior of the planet by sonar. In the days of underground nuclear tests, and from modern-day earthquakes, we can see patterns of how compression waves travel and reflect from the interior.
The science involved in this methodology is incomplete and still evolving.
Recent evidence suggests that the Milky Way Galaxy is a barred spiral galaxy. This type of galaxy features a central bar-like structure with spiral arms extending from it. The Milky Way's structure has been inferred based on observations of its stars and gas distribution.
As of now, there is no definitive evidence of life outside of Earth's atmosphere. Scientists continue to search for signs of life in places like Mars, Europa, and Enceladus, but no concrete proof has been discovered yet.
Sorry. The earths core reminds me of an apple. So here goes. In the center of the apple, there is a core, and that is the hardest a biggest part. So that is the earths core. The crust is the skin of the apple, and that is also the thinnest. The rest is the outer core and mantle.
how does earths distance from the sun change throughout the year
If you were careful not to burn your fingers, about a million Earths could be crammed into the Sun.
Their evidence comes from rocks at earths surface.
Seasons
Techtonic plates
geologist study the earths structure.
Seismic waves
Geology
mantle
physical structure is geology and geology is a movement in the earths crust which is also physical structure.
a. seismic waves b. volcanoes c. earthquakes d. rocks
Rock samples
Rock Samples.
fat trees