These reactions occur in the solid state but may be facilitated by the presence of a fluid phase lining the grain boundaries of the minerals. Minerals within the original rock, or protolith, respond to the changing conditions by reacting with one another to produce a new mineral assemblage that is thermodynamically stable under the new pressure-temperature conditions. In general, these alterations are brought about either by the intrusion of hot magma into cooler surrounding rocks (contact metamorphism) or by large-scale tectonic movements of Earth’s lithospheric plates that alter the pressure-temperature conditions of the rocks (regional metamorphism see also plate tectonics). Metamorphism comprises changes both in mineralogy and in the fabric of the original rock. The word metamorphism is taken from the Greek for “change of form” metamorphic rocks are derived from igneous or sedimentary rocks that have altered their form ( recrystallized) as a result of changes in their physical environment. Slate is a fine-grained clayey metamorphic rock that cleaves, or splits, readily into thin slabs having great tensile strength and durability.
Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.There is a stop and think in the book that students could do with a partner. It contains good information that students could get. Parts of the book could be read aloud to the students as they are learning about rocks. I think that a good teaching idea for this book would include text features. I do like the further evidence sections in the book that students can use to look into as well. I do think it is a bit lengthy for students to read from beginning to end. I like all the facts that are given in the book. It also describes other parts of Earth such as its dynamics. The book gives facts about what rocks are found on/in earth and what it’s made of.
It begins by describing what the rock cycle is and what the earth is made up of. I do like the further evidence sections in the book that students can use to look i The book is non-fiction and gives information about the rock cycle. The book is non-fiction and gives information about the rock cycle.