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).
Lesson Summary [edit]. 1  Mechanical weathering breaks existing rock into smaller pieces without changing the composition of the rock. 2  Ice wedging and abrasion are two important processes of mechanical weathering. 3  The main agents of mechanical weathering are moving water, wind, glacial ice and gravity.
Sedimentary Rocks. Breaking rocks up into smaller pieces. There are lots of processes that cause rocks to break apart into smaller pieces. No matter what causes the rock to break, we call the smaller pieces sediment. A rock that forms from these smaller pieces of sediment is called a sedimentary rock!Keep in mind that even though sediments are 'smaller' pieces of rock, they might be still be the size of a house if they broke off from the side of a massive mountain. Water, wind, and gravity are the main processes that move pieces of rock from place to place. Sediment might get transported thousands of miles by one of the world's major rivers, or it might just go from the top of the hill to the bottom during a landslide or as a result of natural creep.