What must happen for a solar eclipse to occur?
a) the moon must be full.
b) the moon must pass behind earth.
c) the moon’s orbit must cross the plane of the ecliptic.
d) the moon’s orbit must not cross earth’s penumbra.

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.