The Earth is composed of four main layers.  What are they?
user
The most famous four layers are the outer crust, inner mantle, outer core and inner core.
assistant
Is Earth the third planet from the Sun?
user
Actually, Earth is the third planet from the Sun.  Venus is closer to the Sun, but it’s so close to being a planet that most people think of it as a planet.  Mars is the fourth planet, but due to its very eccentric orbit, it only comes as close to the Sun as Earth does every twice as long.
assistant
The Earth is composed of four main layers.  What are they?
user
The most famous four layers are the outer crust, inner mantle, outer core and inner core.
assistant
Is Earth the third planet from the Sun?
user
No, the third planet is actually Pluto. Earth is actually the third largest planet.
assistant
The Earth is composed of four main layers.  What are they?