In English conditional sentences, the condition clause (protasis) is a dependent clause, most commonly introduced by the conjunction if. Other conjunctions or equivalent expressions may also be used, such as unless (meaning if...not), provided (that) , providing (that) and as long as.irst conditional or conditional I refers to a pattern used in predictive conditional sentences, i.e. those that concern consequences of a probable future event (see Types of conditional sentence).
Weathering and erosion. Weathering is the process where rock is dissolved, worn away or broken down into smaller and smaller pieces. There are mechanical, chemical and organic weathering processes. Organic weathering happens when plants break up rocks with their growing roots or plant acids help dissolve rock.
There are really only two processes: one that forms the physical earth, and another that beats up the surface and tears it apart through weathering and erosion. The formational process is called tectonics, and is manifested to those of us living on earth by earthquakes, volcanos, and mountain building in general. The earth is really just a sphere of liquid rock (magma) which has cooled to the solid state where exposed to the coldness of space.