The words weathering and erosion are synonyms; they can be used interchangeably. 

1.True 
2.False 

Graywacke and conglomerate are examples of well-sorted rocks; shales and fine-grained sandstone are examples of poorly sorted rocks. 

1.True 
2.False 

A rock with large, angular fragments and lots of feldspar is classified as immature; a rock with smaller, rounded grains and not much feldspar is classified as mature. 

1.True 
2.False 

The formation of dolostone, due to the introduction of magnesium into limestone, is an example of diagenesis. 

1. True 
2.False