Answer:
The Hubble classification, often called the tuning fork diagram
The planets orbit the sun along the ecliptic plane
Answer:
If two plates move away from each other then a continental rift will form.
Explanation:
There are three basic types of plate boundaries, convergent, divergent, and transform plate boundaries. All of them have their own characteristics and the boundaries can be between oceanic and oceanic, oceanic and continental, and continental and continental plates, and each type creates different landforms.
If there are two plates moving each other over land, then a continental rift will form. Basically, the two plates slowly move away from each other, opening a gap that is constantly widening, so over time, it grows into a rift valley. Over the course of millions of years, the continental rift or rift valley will get filled by oceanic water and physically separate the two landmasses. A perfect example of this is the divergent plate boundary between the Nubian and Somali plates which have created the rift valley cutting through the eastern part of Africa.
Mountains are created when two plates collide. When the plates converge or slide underneath each other the heat causes melting of the crust and volcanoes appear. When they cool off they become islands.
