The electromagnetic force can push things apart. This force exists between charged particles and can cause similar charges to repel each other. Additionally, the force of gravity can also push things apart on a cosmological scale due to the expansion of the universe.
a build up of pressure
When magma pushes 2 plates apart. :)
Electric force of repulsion.
longitudinal waves spread apart as they go
pushes and pulls are things you do when energy is applied
All rocks have cracks in them. If water fills the cracks and freezes, it expands and pushes the rock apart.
lift
Depulso
There is no such character in Things Fall Apart.
pushes things up
When gravity pushes down on the floor it causes ridge pressing. Ridge pressing pries the the sea floor apart causing the magma to come up out of the mantle to cool and create a new crust. Not only does it create a new crust but it pushes the continents father apart. That is why over time they grow father and farther apart.
There's no force that pushes electrically neutral objects apart, but if the objects in question have a net charge, then the force known as electromagnetism will either push similarly charged objects apart, or pull oppositely charged objects together.