why is moving mousewheel zooming in too much?,when scrolling the mwheel, why does the scene view camera move too much?

when i scroll mwheel to zoom in, it does it wayy too much and the skybox clips into the terrain and objects on it so i cant move them

here is a pic: https://ibb.co/mLgCBc,In the scene view, for some reason, the mwheel zooms in far too much and the skybox clips into the terrain, making it impossible to move assets around in my fps game.

here is a link showing the skybox clipping into the terrain: https://ibb.co/mLgCBc