mechabic and organic
answer:true
Geologists classify rocks by looking at their chemical and mineralogical composition then at the the size and shape of their component minerals then at any texture, pattern or grain that the rocks may display. They also classify them in relation to how they were formed.
Metamorphic rocks are formed from sedimentary and igneous rocks. When sedimentary or igneous rock is subjected to heat and pressure, the rock gets compressed. Therefore, if you had the same amount of metamorphic rock and sedimentary or igneous rock, the metamorphic rock would be heavier, because there is more 'stuff' in the metamorphic rock. ---------------------------------------------- However please note: There are types of igneous rocks that are hard (eg granite) and others that are soft (eg volcanic ash). There are types of metamorphic rocks that are hard (eg gneiss) and others that are soft (eg marble). Thus "hardness" is not a characteristic that can be used to distinguish between the two.
I just learned this in school. The two factors in the rock cycle to form metamorphic rock are extreme heat and/or pressure
Igneous is basically fresh out of a volcano. There are two types: rocks that got cooled slowly, and those that were cooled really fast. After a while, these rocks will break down into sediment, and will form into layers. Then the sediment will go through cementation, where they stick together. At that point, its sedimentary rock! (Like sandstone, in the Grand Canyon!)
Limestone or Sandstone are two examples of sedimentary rocks. Two examples of sedimentary rocks are slate (fine silt) and chalk (shell remains of sea creatures).
No two sedimentary rocks are shaped the same, there are many different shapes
sedimentary and metamorphic rocks
Clastic (those formed of particles of other rocks) and non-clastic (organic and chemical precipitate or evaporite rocks).
residual deposits and sedimentary deposits
Coal and Sandstone are two types of sedimentary rocks.
Sedimentary rocks record; 1. Time (Age) of formation. 2. Environment of formation.
Sedimentary and metamorphic rocks.
The two major divisions are prose and poetry.
They are called chemical sedimentary rocks. Rock salt and rock gypsum are two examples.
sediment
Rocks that are composed of rounded grains or fragments are usually sedimentary rocks. Two of these are sandstone and conglomerate rocks.