Revision of the earth

05.03.2020
09:07:07
Dear students, good morning
Today's revision topic: metamorphic rocks
Pg.no : 112 & 113
The important points are
1. Metamorphic rocks are formed when high and pressure change the rocks
2. It's usually harder than the rocks from which they were formed.
3.for examples:
* Marble is a metamorphic rock formed from limestone.it is hard with no pores
* Quartzite is a metamorphic rock formed from sandstone
Homework : metamorphic rocks - exercise 8.5
in science work book
Pg.no : 67
For better understanding of concepts watch the below videos