They split into two pieces. When rain water seeps into fine cracks in a large boulder (for instance), when the water turns to ice during a hard winter, the ice expands. It is this expansion that can cause the boulder to split into two pieces. Normally, the two pieces don't move away far. But one piece could possibly fall away and roll downhill.
The process of rocks banging into each other and wearing away is called abrasion. It occurs when rocks or sediment particles are moved by wind, water, or glaciers, and they scrape against each other, causing them to break down and become smoother over time.
When any fault occurs or tectonic plates pull away from each other under the ground. An earthquake happens.
they reple
Depends upon the two rocks and where they are. You will get dust as one stone wears away the other, or they wear away each other depending on the comparative density. Two rocks in a tumbling drum will slowly round each other off, creating smooth roundish stones. If one has iron content, and the other flint, you could create some sparks that could be used to make a fire. If the rocks are coal, you could get a very fine coal dust that can be lit with a match.
crumble and break and it also depends on on the size of the rock if its big then it might not but if its small it probably will
The rocks move past each other horizontally.
The process of rocks banging into each other and wearing away is called abrasion. It occurs when rocks or sediment particles are moved by wind, water, or glaciers, and they scrape against each other, causing them to break down and become smoother over time.
They push away from each other.
static friction
When any fault occurs or tectonic plates pull away from each other under the ground. An earthquake happens.
they reple
when two similar poles are facing each other, they will push away from each other, or repel.
When rocks stack on each other, contact metamorphism can occur. This type of metamorphism happens when the high temperature and pressure from nearby molten rock alter the composition of the rocks in contact.
Tension, friction and heat increase.
The plates slide across from each other. By that I mean away from each other and they can make earthquakes and mountains!
As two bar magnets move away from each other, the magnetic force between them decreases.
Homologous chromosomes pairs pull away from each other.