1 Melinda: Melinda is the main character of the book Speak. 2  In the beginning of the book, she seems to isolate herself from the world. 3  Throughout the story, she seems to be holding on to a secret that's killing her internally. Heather comes along to meeting Melinda, and instantly thinks that they are the best of friends when actually to Melinda, Heather is just a nuisance. 2  Heather is also the only student at Merryweather even on speaking terms with Melinda. 3  Heather's character is the complete opposite of Melinda's.
By Andrew Alden. Definition: Weathering is the gradual destruction of rock under surface conditions. Weathering may involve physical processes (mechanical weathering) or chemical activity (chemical weathering).
Chemical weathering. The alteration of rocks by water to produce chemical elements in solution and reside clay. There can be either the complete dissolving of rock, or the partial dissolving of certain minerals, putting some elements in solution and leaving others behind as a residue of clay minerals.