Question

1. which plate is the subducting plate at the aleutian trench?
2. what type of plate boundary exists between the indian - australian plate and the antarctic plate?
3. what kind of plate boundary exists at the san andreas fault?
4. what kind of plate boundary exists at the southeast indian ridge?
5. how are the plates moving at the mid - ocean ridge?

Explanation:

1. At the Aleutian Trench, the Pacific Plate is subducting beneath the North - American Plate.
2. The boundary between the Indian - Australian Plate and the Antarctic Plate is a divergent plate boundary where new crust is formed as the plates move apart.
3. The San Andreas Fault is a transform plate boundary where two plates slide past each other horizontally.
4. The Southeast Indian Ridge is a divergent plate boundary, with new oceanic crust being created as the plates separate.
5. At the Mid - Ocean Ridge, the plates are moving apart (diverging), which allows magma to rise and form new oceanic crust.

Answer:

1. Pacific Plate
2. Divergent plate boundary
3. Transform plate boundary
4. Divergent plate boundary
5. Moving apart (diverging)