Thats why there are different types of boundaries. Some can slide past each other, while others will collide into each other! And so, there are three main types of plate boundaries.
The first is Convergent. Convergent boundaries slide towards each other, as one will go under the other, and magma comes through the crack. Thats how volcanoes are formed. Most of the time, the collision is made of a oceanic plate, and a continental plate. Its like eating an Oreo(America's Favorite Cookie!). When you split it in half, there's the cream inside. If you take the other cookie side, and slide it on top the cookie with the cream, the cream, goes off the cookie, and above its former place, onto the OTHER COOKIE!!! SIGH. NOW I WANT A COOKIE!!! :(
The second is Divergent. Divergent boundaries move away from each other, as magma seeps through the opening, making more land. Divergent boundaries are mostly found in the ocean, and thats how islands were formed! Divergent boundaries form places like Hawaii.
The FINAL plate boundary(well, actually there are lots more, but these are the main ones.), is Transform Boundaries. They slide past each other, just like how earthquakes occur.
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