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Has Earth always had the same composition?
The theories of planetary formation indicate that Earth's original form had more hydrogen and helium and less of the current atmospheric nitrogen and oxygen. Water may have been added by comets that Earth swept from its solar orbit.
What are the three types of materials in the planetary rings that collided with the Earth?
The three types of materials found in the planetary rings that collided with the Earth are silicate rock, ice, and organic compounds. These materials were present in the form of dust, debris, and small particles that accumulated in the ring system around the protoplanet. The collision of these materials with the Earth contributed to the formation and composition of our planet.
What causes planetary year?
A planetary year is the amount of time it takes a planet to orbit the Sun. A planetary year on Earth is 365.26 days.
Which planetary body orbits the Earth?
the moon.
What is the center of a planetary body such as the Earth?
equator
What is the arrangement of the inner planets composition into different chemical layers?
This is broadly known as planetary differentiation.
Why do Planetary Geologists assign Longitude and Latitude lines on other planetary bodies besides earth?
For the same reasons they do so on earth. To pinpoint locations.
Length of planetary year?
It depends which planet you are on. On Earth an planetary year is 365 +/- days. On Saturn a single year is almost 30 earth years.
What is the composition of each of the Earth's layer?
What is the composition of each layer of earth?
What is the composition of earth's core?
The Earth's core is thought to be predominantly iron (85 %) with some (4-5%) nickel and the remainder oxygen, silicon, hydrogen and carbon and a number of siderophile (iron liking) elements that descended to the core with iron during planetary differentiation.
What is mercury's composition compared with earth?
The composition of mercury is solid as well as earth.
What is earth's path of revolution called?
REVOLUTION!!!!!
